{"schema_version":1,"title":"Microsoft Office LTSC 2021 vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 82 vulnerabilities in Microsoft Office LTSC 2021: 0 in the last 7 days and 68 in the last 90 days, 1 of them critical and 1 exploited in the wild. The most recent, CVE-2026-56195, was published on 14 July 2026.","url":"https://junglewise.ai/threats/technologies/office-ltsc-2021","json_url":"https://junglewise.ai/threats/technologies/office-ltsc-2021.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/office-ltsc-2021","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","counts":{"high":60,"all_time":82,"critical":1,"exploited":1,"last_7_days":0,"last_30_days":0,"last_90_days":68,"last_365_days":77},"latest":[{"cve":"CVE-2026-56195","cvss":5.5,"slug":"cve-2026-56195-microsoft-office-out-of-bounds-read-information-disclosure","title":"Microsoft Office out-of-bounds read information disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:29.937+00:00","url":"https://junglewise.ai/threats/cve-2026-56195-microsoft-office-out-of-bounds-read-information-disclosure"},{"cve":"CVE-2026-56192","cvss":5.5,"slug":"cve-2026-56192-microsoft-office-out-of-bounds-read-information-disclosure","title":"Microsoft Office Out-of-bounds Read Information Disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:29.447+00:00","url":"https://junglewise.ai/threats/cve-2026-56192-microsoft-office-out-of-bounds-read-information-disclosure"},{"cve":"CVE-2026-56156","cvss":7.8,"slug":"cve-2026-56156-microsoft-office-excel-heap-buffer-overflow","title":"Microsoft Office Excel heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:22.537+00:00","url":"https://junglewise.ai/threats/cve-2026-56156-microsoft-office-excel-heap-buffer-overflow"},{"cve":"CVE-2026-55949","cvss":7.8,"slug":"cve-2026-55949-microsoft-excel-use-of-uninitialized-resource-code-execution","title":"Microsoft Excel use of uninitialized resource code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:22.32+00:00","url":"https://junglewise.ai/threats/cve-2026-55949-microsoft-excel-use-of-uninitialized-resource-code-execution"},{"cve":"CVE-2026-55947","cvss":7.8,"slug":"cve-2026-55947-microsoft-office-excel-heap-buffer-overflow","title":"Microsoft Office Excel heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:22.05+00:00","url":"https://junglewise.ai/threats/cve-2026-55947-microsoft-office-excel-heap-buffer-overflow"},{"cve":"CVE-2026-55898","cvss":6.1,"slug":"cve-2026-55898-microsoft-office-excel-out-of-bounds-read","title":"Microsoft Office Excel out-of-bounds read","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:21.64+00:00","url":"https://junglewise.ai/threats/cve-2026-55898-microsoft-office-excel-out-of-bounds-read"},{"cve":"CVE-2026-55142","cvss":5.5,"slug":"cve-2026-55142-microsoft-office-word-numeric-truncation-information-disclosure","title":"Microsoft Office Word numeric truncation information disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:21.273+00:00","url":"https://junglewise.ai/threats/cve-2026-55142-microsoft-office-word-numeric-truncation-information-disclosure"},{"cve":"CVE-2026-55141","cvss":7.8,"slug":"cve-2026-55141-microsoft-office-excel-stack-based-buffer-overflow","title":"Microsoft Office Excel stack-based buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:21.123+00:00","url":"https://junglewise.ai/threats/cve-2026-55141-microsoft-office-excel-stack-based-buffer-overflow"},{"cve":"CVE-2026-55140","cvss":7.8,"slug":"cve-2026-55140-microsoft-office-heap-buffer-overflow","title":"Microsoft Office heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:20.997+00:00","url":"https://junglewise.ai/threats/cve-2026-55140-microsoft-office-heap-buffer-overflow"},{"cve":"CVE-2026-55139","cvss":5.5,"slug":"cve-2026-55139-microsoft-office-out-of-bounds-read","title":"Microsoft Office out-of-bounds read","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:20.863+00:00","url":"https://junglewise.ai/threats/cve-2026-55139-microsoft-office-out-of-bounds-read"},{"cve":"CVE-2026-55138","cvss":5.5,"slug":"cve-2026-55138-microsoft-excel-untrusted-pointer-dereference-information","title":"Microsoft Excel untrusted pointer dereference information disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:20.72+00:00","url":"https://junglewise.ai/threats/cve-2026-55138-microsoft-excel-untrusted-pointer-dereference-information"},{"cve":"CVE-2026-55137","cvss":7.8,"slug":"cve-2026-55137-microsoft-office-excel-heap-buffer-overflow","title":"Microsoft Office Excel heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:20.583+00:00","url":"https://junglewise.ai/threats/cve-2026-55137-microsoft-office-excel-heap-buffer-overflow"},{"cve":"CVE-2026-55136","cvss":7.8,"slug":"cve-2026-55136-microsoft-excel-untrusted-pointer-dereference-remote-code","title":"Microsoft Excel untrusted pointer dereference remote code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:20.437+00:00","url":"https://junglewise.ai/threats/cve-2026-55136-microsoft-excel-untrusted-pointer-dereference-remote-code"},{"cve":"CVE-2026-55132","cvss":7.8,"slug":"cve-2026-55132-microsoft-office-word-double-free-local-code-execution","title":"Microsoft Office Word double free local code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:19.85+00:00","url":"https://junglewise.ai/threats/cve-2026-55132-microsoft-office-word-double-free-local-code-execution"},{"cve":"CVE-2026-55131","cvss":7.8,"slug":"cve-2026-55131-microsoft-excel-heap-buffer-overflow-code-execution","title":"Microsoft Excel heap buffer overflow code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:19.717+00:00","url":"https://junglewise.ai/threats/cve-2026-55131-microsoft-excel-heap-buffer-overflow-code-execution"},{"cve":"CVE-2026-55130","cvss":7.8,"slug":"cve-2026-55130-microsoft-office-word-heap-buffer-overflow","title":"Microsoft Office Word heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:19.587+00:00","url":"https://junglewise.ai/threats/cve-2026-55130-microsoft-office-word-heap-buffer-overflow"},{"cve":"CVE-2026-55129","cvss":7.8,"slug":"cve-2026-55129-microsoft-office-heap-overflow-remote-code-execution","title":"Microsoft Office heap overflow remote code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:19.463+00:00","url":"https://junglewise.ai/threats/cve-2026-55129-microsoft-office-heap-overflow-remote-code-execution"},{"cve":"CVE-2026-55125","cvss":7.8,"slug":"cve-2026-55125-microsoft-office-heap-overflow-in-code-execution","title":"Microsoft Office heap overflow in code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:18.92+00:00","url":"https://junglewise.ai/threats/cve-2026-55125-microsoft-office-heap-overflow-in-code-execution"},{"cve":"CVE-2026-55123","cvss":7.8,"slug":"cve-2026-55123-microsoft-powerpoint-heap-overflow-in-numeric-type-conversion","title":"Microsoft PowerPoint heap overflow in numeric type conversion","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:18.633+00:00","url":"https://junglewise.ai/threats/cve-2026-55123-microsoft-powerpoint-heap-overflow-in-numeric-type-conversion"},{"cve":"CVE-2026-55122","cvss":7.1,"slug":"cve-2026-55122-microsoft-excel-out-of-bounds-read-information-disclosure","title":"Microsoft Excel out-of-bounds read information disclosure","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:18.5+00:00","url":"https://junglewise.ai/threats/cve-2026-55122-microsoft-excel-out-of-bounds-read-information-disclosure"},{"cve":"CVE-2026-55121","cvss":5.5,"slug":"cve-2026-55121-microsoft-office-out-of-bounds-read-information-disclosure","title":"Microsoft Office out-of-bounds read information disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:18.347+00:00","url":"https://junglewise.ai/threats/cve-2026-55121-microsoft-office-out-of-bounds-read-information-disclosure"},{"cve":"CVE-2026-55120","cvss":7.8,"slug":"cve-2026-55120-microsoft-powerpoint-heap-overflow-code-execution","title":"Microsoft PowerPoint heap overflow code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:18.22+00:00","url":"https://junglewise.ai/threats/cve-2026-55120-microsoft-powerpoint-heap-overflow-code-execution"},{"cve":"CVE-2026-55058","cvss":7.8,"slug":"cve-2026-55058-microsoft-excel-out-of-bounds-read-code-execution","title":"Microsoft Excel out-of-bounds read code execution","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:18.087+00:00","url":"https://junglewise.ai/threats/cve-2026-55058-microsoft-excel-out-of-bounds-read-code-execution"},{"cve":"CVE-2026-55057","cvss":5.5,"slug":"cve-2026-55057-microsoft-office-integer-overflow-information-disclosure","title":"Microsoft Office integer overflow information disclosure","severity":"medium","exploited":false,"published_at":"2026-07-14T18:18:17.953+00:00","url":"https://junglewise.ai/threats/cve-2026-55057-microsoft-office-integer-overflow-information-disclosure"},{"cve":"CVE-2026-55056","cvss":7.8,"slug":"cve-2026-55056-microsoft-office-heap-buffer-overflow","title":"Microsoft Office heap buffer overflow","severity":"high","exploited":false,"published_at":"2026-07-14T18:18:17.827+00:00","url":"https://junglewise.ai/threats/cve-2026-55056-microsoft-office-heap-buffer-overflow"}],"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":68},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Microsoft Windows","slug":"windows-","vulnerabilities":963,"url":"https://junglewise.ai/threats/technologies/windows-"},{"name":"Microsoft Windows 10","slug":"windows-10","vulnerabilities":588,"url":"https://junglewise.ai/threats/technologies/windows-10"},{"name":"Microsoft Windows 11","slug":"windows-11","vulnerabilities":493,"url":"https://junglewise.ai/threats/technologies/windows-11"},{"name":"Microsoft Windows Server 2012","slug":"windows-server-2012","vulnerabilities":293,"url":"https://junglewise.ai/threats/technologies/windows-server-2012"},{"name":"Microsoft Windows Server 2016","slug":"windows-server-2016","vulnerabilities":213,"url":"https://junglewise.ai/threats/technologies/windows-server-2016"},{"name":"Microsoft Windows Server 2019","slug":"windows-server-2019","vulnerabilities":211,"url":"https://junglewise.ai/threats/technologies/windows-server-2019"},{"name":"Microsoft Windows 11 24h2","slug":"windows-11-24h2","vulnerabilities":192,"url":"https://junglewise.ai/threats/technologies/windows-11-24h2"},{"name":"Microsoft Windows Server 2022","slug":"windows-server-2022","vulnerabilities":178,"url":"https://junglewise.ai/threats/technologies/windows-server-2022"},{"name":"Microsoft Edge","slug":"edge-chromium-based","vulnerabilities":167,"url":"https://junglewise.ai/threats/technologies/edge-chromium-based"},{"name":"Microsoft Windows 11 25h2","slug":"windows-11-25h2","vulnerabilities":161,"url":"https://junglewise.ai/threats/technologies/windows-11-25h2"},{"name":"Microsoft Windows 11 Version 26H1","slug":"windows-11-version-26h1","vulnerabilities":135,"url":"https://junglewise.ai/threats/technologies/windows-11-version-26h1"},{"name":"Microsoft Windows Server 2025","slug":"windows-server-2025","vulnerabilities":124,"url":"https://junglewise.ai/threats/technologies/windows-server-2025"}],"technology":{"hub":true,"name":"Microsoft Office LTSC 2021","slug":"office-ltsc-2021","vendor":{"name":"Microsoft","slug":"microsoft","url":"https://junglewise.ai/threats/vendors/microsoft"},"aliases":[],"category":"software-suite","homepage":"https://www.microsoft.com/en-us/microsoft-365/enterprise/microsoft-office-ltsc-2021","description":"A perpetual license version of the Microsoft Office suite for commercial and government customers.","url":"https://junglewise.ai/threats/technologies/office-ltsc-2021"},"most_severe":[{"cve":"CVE-2026-21509","cvss":7.8,"epss":0.7215,"slug":"cve-2026-21509-microsoft-office-security-feature-bypass-via-untrusted-inputs","title":"Microsoft Office security feature bypass via untrusted inputs","severity":"critical","exploited":true,"published_at":"2026-01-26T18:16:38.54+00:00","url":"https://junglewise.ai/threats/cve-2026-21509-microsoft-office-security-feature-bypass-via-untrusted-inputs"},{"cve":"CVE-2025-47162","cvss":8.4,"epss":0.0121,"slug":"cve-2025-47162-microsoft-office-heap-buffer-overflow-allows-local-code-execution","title":"Microsoft Office heap buffer overflow allows local code execution","severity":"high","exploited":false,"published_at":"2025-06-10T17:23:26.63+00:00","url":"https://junglewise.ai/threats/cve-2025-47162-microsoft-office-heap-buffer-overflow-allows-local-code-execution"},{"cve":"CVE-2025-49696","cvss":8.4,"epss":0.008,"slug":"cve-2025-49696-microsoft-office-out-of-bounds-read-and-local-code-execution","title":"Microsoft Office out-of-bounds read and local code execution","severity":"high","exploited":false,"published_at":"2025-07-08T17:15:55.917+00:00","url":"https://junglewise.ai/threats/cve-2025-49696-microsoft-office-out-of-bounds-read-and-local-code-execution"},{"cve":"CVE-2025-49695","cvss":8.4,"epss":0.008,"slug":"cve-2025-49695-microsoft-office-use-after-free-local-code-execution","title":"Microsoft Office use after free local code execution","severity":"high","exploited":false,"published_at":"2025-07-08T17:15:55.697+00:00","url":"https://junglewise.ai/threats/cve-2025-49695-microsoft-office-use-after-free-local-code-execution"},{"cve":"CVE-2025-49697","cvss":8.4,"epss":0.0062,"slug":"cve-2025-49697-microsoft-office-heap-overflow-code-execution","title":"Microsoft Office heap overflow code execution","severity":"high","exploited":false,"published_at":"2025-07-08T17:15:56.147+00:00","url":"https://junglewise.ai/threats/cve-2025-49697-microsoft-office-heap-overflow-code-execution"},{"cve":"CVE-2026-33115","cvss":8.4,"epss":0.0032,"slug":"cve-2026-33115-microsoft-office-word-use-after-free-code-execution","title":"Microsoft Office Word use after free code execution","severity":"high","exploited":false,"published_at":"2026-04-14T18:17:33.707+00:00","url":"https://junglewise.ai/threats/cve-2026-33115-microsoft-office-word-use-after-free-code-execution"},{"cve":"CVE-2026-33114","cvss":8.4,"epss":0.0032,"slug":"cve-2026-33114-microsoft-office-word-untrusted-pointer-dereference","title":"Microsoft Office Word untrusted pointer dereference","severity":"high","exploited":false,"published_at":"2026-04-14T18:17:33.51+00:00","url":"https://junglewise.ai/threats/cve-2026-33114-microsoft-office-word-untrusted-pointer-dereference"},{"cve":"CVE-2025-62554","cvss":8.4,"epss":0.0013,"slug":"cve-2025-62554-microsoft-office-type-confusion-local-code-execution","title":"Microsoft Office type confusion local code execution","severity":"high","exploited":false,"published_at":"2025-12-09T18:16:00.62+00:00","url":"https://junglewise.ai/threats/cve-2025-62554-microsoft-office-type-confusion-local-code-execution"},{"cve":"CVE-2026-26110","cvss":8.4,"epss":0.0007,"slug":"cve-2026-26110-microsoft-office-type-confusion-local-code-execution","title":"Microsoft Office type confusion local code execution","severity":"high","exploited":false,"published_at":"2026-03-10T18:18:39.48+00:00","url":"https://junglewise.ai/threats/cve-2026-26110-microsoft-office-type-confusion-local-code-execution"},{"cve":"CVE-2025-62557","cvss":8.4,"epss":0.0006,"slug":"cve-2025-62557-microsoft-office-use-after-free-local-code-execution","title":"Microsoft Office use after free local code execution","severity":"high","exploited":false,"published_at":"2025-12-09T18:16:01.127+00:00","url":"https://junglewise.ai/threats/cve-2025-62557-microsoft-office-use-after-free-local-code-execution"}],"generated_at":"2026-09-26T09:24:00.138874+00:00"}