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patches\u003C/a>\u003C/strong>\u003C/p>",[474,475],{"id":286,"title":287},{"id":283,"title":284},{"id":477,"title":478,"description":479,"plans":480},"MJlLPyxqTcy9ys2UaZYNKQ","Windows 10 v1909 patches","\u003Cp>Windows 10 1909 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[481,482],{"id":283,"title":284},{"id":286,"title":287},{"id":484,"title":485,"description":486,"plans":487},"GscjCa1TQOe5p5Or7g2qyw","Windows 10 v1809 patches","\u003Cp>Windows 10 1809 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[488,489],{"id":283,"title":284},{"id":286,"title":287},{"id":491,"title":492,"description":493,"plans":494},"OeQ8xMmJTmadIiPcKYkhvw","Windows 10 v1803 patches","\u003Cp>Windows 10 1803 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+10\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows 10 patches\u003C/a>\u003C/strong>\u003C/p>",[495,496],{"id":283,"title":284},{"id":286,"title":287},{"id":498,"title":499,"description":500,"plans":501},"Obe8z8snRYGoLT6BZyzhZw","Windows 7 post-EOS and post-ESU patches","\u003Cp>Windows 7 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>",[502,503],{"id":283,"title":284},{"id":286,"title":287},"Windows Patches","DXze3dvpTu-HF132vKjSug","microsoft-windows-xp",{"alt":508,"url":509,"width":510,"height":510,"responsiveImage":511},"Windows 11 logo","https://www.datocms-assets.com/166020/1764600963-win11.png",300,{"srcSet":512,"webpSrcSet":513,"sizes":514,"src":515,"width":516,"height":516,"aspectRatio":210,"alt":508,"title":18,"bgColor":517,"base64":518},"https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&fit=crop&h=40 40w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=1.5&fit=crop&h=40 60w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=2&fit=crop&h=40 80w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=3&fit=crop&h=40 120w,https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&dpr=4&fit=crop&h=40 160w","https://www.datocms-assets.com/166020/1764600963-win11.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&h=40 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Server 2012 R2 post-EOS patches","\u003Cp>Windows Server 2012 R2 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2012+R2\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2012 R2 patches\u003C/a>\u003C/strong>\u003C/p>",[529,530],{"id":283,"title":284},{"id":286,"title":287},{"id":532,"title":533,"description":534,"plans":535},"ZaeezXKkT3KGln5CQ4NH9w","Windows Server 2012 post-EOS patches","\u003Cp>Windows Server 2012 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2012\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2012 patches\u003C/a>\u003C/strong>\u003C/p>",[536,537],{"id":283,"title":284},{"id":286,"title":287},{"id":539,"title":540,"description":541,"plans":542},"RYxw9xwXR3-OWnsdr8dFEg","Windows Server 2008 R2 post-EOS and post-ESU patches","\u003Cp>Windows Server 2008 R2 post-end-of-support patches, for computers without Extended Security Updates (ESU), or computers with any full year of ESU updates installed\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Windows+Server+2008+R2\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Windows Server 2008 R2 patches\u003C/a>\u003C/strong>\u003C/p>",[543,544],{"id":283,"title":284},{"id":286,"title":287},"Windows Server Patches","J7WLPCrKS7i7B8sAyJpKWg","microsoft-windows-vista",{"alt":549,"url":550,"width":551,"height":510,"responsiveImage":552},"Windows Server 2012-2022 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Office 2019 post-EOS patches","\u003Cp>Microsoft Office 2019 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2019\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2019 patches\u003C/a>\u003C/strong>\u003C/p>",[570,571],{"id":283,"title":284},{"id":286,"title":287},{"id":573,"title":574,"description":575,"plans":576},"MkFk40IJQhCcXnIO2ZDd4Q","Microsoft Office 2016 post-EOS patches","\u003Cp>Microsoft Office 2016 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2016\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2016 patches\u003C/a>\u003C/strong>\u003C/p>",[577,578],{"id":283,"title":284},{"id":286,"title":287},{"id":580,"title":581,"description":582,"plans":583},"FFqWfGxfQF2q0uyjyRjVWg","Microsoft Office 2013 post-EOS patches","\u003Cp>Microsoft Office 2013 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2013\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2013 patches\u003C/a>\u003C/strong>\u003C/p>",[584,585],{"id":283,"title":284},{"id":286,"title":287},{"id":587,"title":588,"description":589,"plans":590},"XFYgrsOyRpeuEXk29M4z9g","Microsoft Office 2010 post-EOS patches","\u003Cp>Microsoft Office 2010 post-end-of-support patches\u003C/p>\n\u003Cp>\u003Cstrong>\u003Ca href=\"/patches?product=Office+2010\" target=\"_blank\" rel=\"noopener\">Click to see the full list of our Microsoft Office 2010 patches\u003C/a>\u003C/strong>\u003C/p>",[591,592],{"id":283,"title":284},{"id":286,"title":287},"Microsoft Office Patches","VH2unwR4RjycDA1o_6eSFw","microsoft-windows-7",{"alt":597,"url":598,"width":510,"height":510,"responsiveImage":599},"Microsoft Office 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products patches","\u003Cp>We occasionally patch other Windows products, for instance when a critical vulnerability becomes known and the vendor does not provide an official patch in a timely manner\u003C/p>",[613],{"id":283,"title":284},"Other","BrWA-hAsQYSROgTvF-1ecA","microsoft-windows-11",{"alt":618,"url":619,"width":620,"height":621,"responsiveImage":18},"Windows 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more",[688,691],{"id":689,"primary":685,"externalLink":95,"parent":18,"reference":18,"title":690,"description":40,"publishTranslation":42},"B1pEweRaRD2YBkP6aH1CfA","Help center",{"id":692,"primary":42,"externalLink":693,"parent":18,"reference":18,"title":694,"description":40,"publishTranslation":42},"Mk0Yz-yqTk2akShgf7ARNg","https://central.0patch.com/","Sign in",[696,700],{"id":697,"title":698,"url":699},"NDrk5d4kQ96J2aCuTr-gvg","0patch on X","https://twitter.com/0patch",{"id":701,"title":702,"url":703},"GqN4lYxyTMyzcmRllVY4mg","Linked In","https://linkedin.com/company/0patch",{"left":705,"top":705,"width":706,"height":706,"rotate":705,"vFlip":685,"hFlip":685,"body":707},0,24,"\u003Cg fill=\"none\">\u003Cpath d=\"M11.9999 15.0539L6.34619 9.40013L7.39994 8.34637L11.9999 12.9464L16.5999 8.34637L17.6537 9.40013L11.9999 15.0539Z\" fill=\"currentColor\"/>\u003C/g>",{"left":705,"top":705,"width":706,"height":706,"rotate":705,"vFlip":685,"hFlip":685,"body":709},"\u003Cg 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website.",{"tag":722,"attributes":733,"content":18},{"property":734,"content":731},"og:description",{"tag":722,"attributes":736,"content":18},{"name":737,"content":731},"twitter:description",{"tag":722,"attributes":739,"content":18},{"property":740,"content":741},"og:image","https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=format&fit=max&w=1200",{"tag":722,"attributes":743,"content":18},{"property":744,"content":745},"og:image:width","1200",{"tag":722,"attributes":747,"content":18},{"property":748,"content":749},"og:image:height","600",{"tag":722,"attributes":751,"content":18},{"property":752,"content":753},"og:image:alt","CVE-2023-21716",{"tag":722,"attributes":755,"content":18},{"name":756,"content":741},"twitter:image",{"tag":722,"attributes":758,"content":18},{"name":759,"content":753},"twitter:image:alt",{"tag":722,"attributes":761,"content":18},{"property":762,"content":32},"og:locale",{"tag":722,"attributes":764,"content":18},{"property":765,"content":77},"og:type",{"tag":722,"attributes":767,"content":18},{"property":768,"content":6},"og:site_name",{"tag":722,"attributes":770,"content":18},{"property":771,"content":772},"article:modified_time","2026-05-29T13:02:39Z",{"tag":722,"attributes":774,"content":18},{"property":775,"content":40},"article:publisher",{"tag":722,"attributes":777,"content":18},{"name":778,"content":779},"twitter:card","summary",{"tag":722,"attributes":781,"content":18},{"name":782,"content":783},"robots","noindex",[785],{"value":786,"locale":32},"micropatches-for-microsoft-word-remote",[788],{"value":42,"locale":32},"2023-03-09T15:10:00+01:00","Mitja Kolsek","Vat70NxYRzehUfp3vtyW0Q",{"blocks":793,"links":794,"value":795},[],[],{"schema":796,"document":797},"dast",{"type":798,"children":799},"root",[800,843,856,877,881,885,889,893,896,901,914,929,933,937,969,981,998],{"type":801,"children":802},"paragraph",[803,806,814,816,823,825,832,834,841],{"type":804,"value":805},"span","February 2023 Windows Updates brought a fix for  ",{"url":807,"meta":808,"type":12,"children":812},"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716",[809],{"id":810,"value":811},"target","_blank",[813],{"type":804,"value":753},{"type":804,"value":815},", a remote code execution vulnerability in Microsoft Word. The vulnerability was discovered and reported by security researcher Joshua J. Drake (",{"url":817,"meta":818,"type":12,"children":820},"https://twitter.com/jduck",[819],{"id":810,"value":811},[821],{"type":804,"value":822},"Twitter",{"type":804,"value":824},", ",{"url":826,"meta":827,"type":12,"children":829},"https://infosec.exchange/@jduck",[828],{"id":810,"value":811},[830],{"type":804,"value":831},"Mastodon",{"type":804,"value":833},"), and subsequently ",{"url":835,"meta":836,"type":12,"children":838},"https://qoop.org/publications/cve-2023-21716-rtf-fonttbl.md",[837],{"id":810,"value":811},[839],{"type":804,"value":840},"published with a simple proof-of-concept",{"type":804,"value":842},".\n",{"type":801,"children":844},[845,847,854],{"type":804,"value":846},"The flaw is in Word's processing of an RTF file with an excessive number of font records, whereby a numeric operation with sign extension results in the code writing to an address outside the intended memory block. With sufficient heap grooming, arbitrary code execution could be possible upon user merely opening a malicious Word document, previewing it in Explorer's Preview Pane, or viewing a malicious email in Outlook. This vulnerability apparently goes back to ",{"url":848,"meta":849,"type":12,"children":851},"https://twitter.com/wdormann/status/1633617779424100354",[850],{"id":810,"value":811},[852],{"type":804,"value":853},"Office 97",{"type":804,"value":855},".",{"type":801,"children":857},[858,860,867,869,876],{"type":804,"value":859},"Microsoft's patch for this issue is not subtle at all: when a sufficiently large number of font records (specifically, more than 32760) is detected in an RTF document, Word just terminates itself. This approach is not new and has ",{"url":861,"meta":862,"type":12,"children":864},"https://twitter.com/secbughunter/status/818618413870260226",[863],{"id":810,"value":811},[865],{"type":804,"value":866},"reportedly been used before",{"type":804,"value":868},", but may have negative side effects such as lost data (Word crashing while editing an unsaved document) or being unable to use Outlook because it ",{"url":870,"meta":871,"type":12,"children":873},"https://twitter.com/wdormann/status/1633592337812148225",[872],{"id":810,"value":811},[874],{"type":804,"value":875},"displays the malicious email every time you open it - and crashes",{"type":804,"value":842},{"type":801,"children":878},[879],{"type":804,"value":880},"While still-supported Microsoft Office versions have already received an official vendor fix for this vulnerability, Office 2010 - which we have security-adopted - is also vulnerable. In order to protect our Office 2010 users, we have created our own micropatches for this vulnerability. They are already available through the 0patch service.",{"type":801,"children":882},[883],{"type":804,"value":884}," ",{"type":801,"children":886},[887],{"type":804,"value":888},"Our patches are logically equivalent to Microsoft's patches for this issue.",{"type":801,"children":890},[891],{"type":804,"value":892},"\n\nMODULE_PATH \"..\\Affected_Modules\\wwlib.dll_14.0.7268.5000_Office-2010_64bit\\wwlib.dll\"\nPATCH_ID 1315\nPATCH_FORMAT_VER 2\nVULN_ID 7683\nPLATFORM win64\n\npatchlet_start\n    PATCHLET_ID 1\n    PATCHLET_TYPE 2\n    PATCHLET_OFFSET 0x2f3cd6\n    N_ORIGINALBYTES 5\n    JUMPOVERBYTES 0\n    PIT kernel32.dll!TerminateProcess,kernel32.dll!GetCurrentProcess\n    \n    code_start\n           \n        lea r9, [rsi+0Ah]          ; add 0Ah to the current font table index\n        lea eax, [r9+8000h]        ; add 8000h\n        cmp eax, 0FFFFh            ; check if sign extension would happen\n        jbe CONTINUE               ; if not, continue normal execution\n       \n        call PIT_GetCurrentProcess ; retrieve a pseudo handle for the current process,\n                                   ; currently -1, For compatibility with future operating\n                                   ; systems, it is best to call GetCurrentProcess\n                                   ; instead of hard-coding this constant value\n        call PIT_ExploitBlocked    ; Exploit Blocked popup\n        mov rcx, rax               ; handle (-1)\n        mov rdx, 0xbadbaffa        ; exit code\n        call PIT_TerminateProcess  ; terminates the specified process and all of its threads\n       \n    CONTINUE:\n    \n    code_end\npatchlet_end\n\n",{"type":801,"children":894},[895],{"type":804,"value":884},{"type":897,"level":522,"children":898},"heading",[899],{"type":804,"value":900},"Micropatch Availability\n",{"type":801,"children":902},[903,905,912],{"type":804,"value":904},"The micropatch was written for the following ",{"url":906,"meta":907,"type":12,"children":909},"https://0patch.zendesk.com/hc/en-us/articles/4403751356050",[908],{"id":810,"value":811},[910],{"type":804,"value":911},"security-adopted",{"type":804,"value":913}," versions of Office with all available updates installed:",{"type":915,"style":916,"children":917},"list","numbered",[918],{"type":919,"children":920},"listItem",[921],{"type":801,"children":922},[923,927],{"type":804,"marks":924,"value":926},[925],"strong","Microsoft Office 2010",{"type":804,"value":928},"\n",{"type":801,"children":930},[931],{"type":804,"value":932},"\nThis micropatch has already been distributed to, and applied on, all online 0patch Agents in PRO or Enterprise accounts (unless Enterprise group settings prevented that). ",{"type":801,"children":934},[935],{"type":804,"value":936},"Vulnerabilities like this one get discovered on a regular basis, and attackers know about them. If you're using Office 2010, or soon-to-be-expired Office 2013 that goes out of support in April this year, 0patch will make sure such vulnerabilities won't be exploited on your computers - and you won't even have to know or care about updating.\n",{"type":801,"children":938},[939,941,951,953,960,962,967],{"type":804,"value":940},"If you're new to 0patch, create a free account in ",{"url":942,"meta":943,"type":12,"children":948},"https://central.0patch.com",[944,947],{"id":945,"value":946},"rel","url noopener noreferrer",{"id":810,"value":811},[949],{"type":804,"value":950},"0patch Central",{"type":804,"value":952},", then install and register 0patch Agent from ",{"url":55,"meta":954,"type":12,"children":957},[955,956],{"id":945,"value":946},{"id":810,"value":811},[958],{"type":804,"value":959},"0patch.com",{"type":804,"value":961},", and email ",{"url":963,"type":12,"children":964},"mailto:sales@0patch.com",[965],{"type":804,"value":966},"sales@0patch.com",{"type":804,"value":968}," for a trial. Everything else will happen automatically. No computer reboot will be needed.",{"type":801,"children":970},[971,973,979],{"type":804,"value":972},"To learn more about 0patch, please visit our ",{"url":974,"meta":975,"type":12,"children":977},"https://0patch.zendesk.com/hc/en-us",[976],{"id":810,"value":811},[978],{"type":804,"value":97},{"type":804,"value":980},". ",{"type":801,"children":982},[983,985,990,991,996],{"type":804,"value":984},"We'd like to thank Joshua J. Drake (",{"url":817,"meta":986,"type":12,"children":988},[987],{"id":810,"value":811},[989],{"type":804,"value":822},{"type":804,"value":824},{"url":826,"meta":992,"type":12,"children":994},[993],{"id":810,"value":811},[995],{"type":804,"value":831},{"type":804,"value":997},") for sharing their POC, which allowed us to create a micropatch and protect our users against this attack. We also encourage all security researchers to privately share their analyses with us for micropatching.",{"type":801,"children":999},[1000],{"type":804,"value":884},{"alt":753,"url":1002,"width":1003,"height":1004,"responsiveImage":1005},"https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png",1600,800,{"srcSet":1006,"webpSrcSet":1007,"sizes":1008,"src":1009,"width":1010,"height":1011,"aspectRatio":228,"alt":753,"title":18,"bgColor":1012,"base64":1013},"https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&w=1440 360w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.5&fit=crop&w=1440 720w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.75&fit=crop&w=1440 1080w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&fit=crop&w=1440 1440w","https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.25&fit=crop&fm=webp&w=1440 360w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.5&fit=crop&fm=webp&w=1440 720w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&dpr=0.75&fit=crop&fm=webp&w=1440 1080w,https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&fit=crop&fm=webp&w=1440 1440w","(max-width: 1440px) 100vw, 1440px","https://www.datocms-assets.com/166020/1774002325-7683_vulncard.png?auto=compress&crop=focalpoint&fit=crop&w=1440",1440,720,"#6eb2bb","data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAMCAMAAABP7o1HAAADAFBMVEWn1tin19mn2Nqo1Nao1tio2Nqp1Nap1deq1Naq2Nqq2dur1Nar1tir2tys1des1tit2dut292u1tiu2Nqv19mw292x19mx2Nqx2dux3N6x3d+y2Nqy2duz2duz2ty02du029203N603uC03+G12ty22ty32ty329233N633d+33uC33+G34OK429243d+529253uC629263N663d+63uC64OK73N673+G74eO83N684eO929293d+93+G94OK94eO94uS+3N6+4OK+5Oa/3N6/4uS/5ObA3N7A3d/A3uDA3+HA4OLA4ePA5efA5ujB3N7B4OLB4+XC3d/C3+HC4OLC4ePC5efC5ujD3N7D3d/D3uDD4ePE3N/E4+bE5ujE5+nF3d/F3+HF4OLF4ePG3N7G3uDG3+HG4ePG5+nH3d/H4ePH5ObH5ujI3+HI4OLI6OrJ3d/J3uDJ3+HJ4ePJ5ObJ5ujK3uDK4uTL4OLL4ePL6OrM3uDM3+HM4uTM5ObM5ujN3uDN4+XN6OrO3+HO4uTP4OLP4ePP4uTP5ObP5ujQ3+HQ4ePQ6OrR3+HR4+XR5ObS4OLS4+XS5efS5+nT4ePT4+XT6OrU4ePU4uTU5efV4ePV5efV5+nW4uTW5ObW5efW6OrX4+XX5ObX5+nY4uTY5+nZ4+XZ5ujZ6Ora5Oba5+na6Ora6evb5ejb5ujb6Orc5Obc5efc6Ord5efd5ujd6evd6uze5+ne6Ore6eve6uze6+3f6uzg5+ng6Org6evg6uzg6+3h6+3h7O7i6uzi6+3i7O7j6evj6uzj6+3k6Ork6Ovk6evk6uzl6uzl6+3m6uzm6+3m7e/n6uzn6+3n7O7n7vDo6+3o7O7q7O7q7/Hr7O7r7e/r8PLs7e/s7vDs7/Ht7e/u7vDu8fPv7vDv7/Hw7/Hw8fPw8vTx7/Hy8PLy8fPy8/Xz8PLz8vT08vT09Pb18vT18/X19Pb28vT39Pb39vj49vj59ff59/n69ff69vj79/n89/n8+Pr9+PptqYL9AAAAtUlEQVR42jWOWW5EIQwEwW6vwJvk/lfNjGMipRF8lEy7QOyIiG0nHjv5ZPoSpYEab1TVu2+BuIhQcxYurJ/6DzETA4wBvqlP1UcBiMFE4V3Fsw+Exfo1EVNz69lGTCCIhltmRsZWo/5hxNowlu+VN4+r8CQkKa8833v3dJ79atnbjyNk61nN8zlrfy1Tbe2BF6ns/cRt8bXczdp0EBZb+B+P6CWtJ8CcAzl7M8sVRCMWME2a4xdAfCZsTtA5YgAAAABJRU5ErkJggg==",1780067941315]