365 Apps
CVE-2026-20944
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AnalysisAI
Microsoft Office Word contains an out-of-bounds read vulnerability that enables local code execution on affected systems. Users of Microsoft 365 Apps and Office Long Term Servicing Channel are at risk, as an attacker with local access can exploit this memory safety flaw to execute arbitrary code with full system privileges. No patch is currently available for this high-severity vulnerability.
Technical ContextAI
Classified as CWE-125 (Out-of-bounds Read). Affects 365 Apps. Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.
RemediationAI
Monitor vendor advisories for a patch.
Microsoft Office contains a security feature bypass (CVE-2026-21509, CVSS 7.8) where reliance on untrusted inputs in sec
Microsoft Office Word contains a security decision bypass (CVE-2026-21514, CVSS 7.8) through reliance on untrusted input
Microsoft Outlook Remote Code Execution Vulnerability. Rated critical severity (CVSS 9.8), this vulnerability is remotel
Use-after-free vulnerability in Microsoft Office Word that allows local, unauthenticated attackers to execute arbitrary
Microsoft Excel Remote Code Execution Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is remotely expl
Microsoft Office Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack
Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally. Rated high severity (C
Use-after-free vulnerability in Microsoft Office Excel that allows local code execution with high severity (CVSS 7.8). A
Use-after-free vulnerability in Microsoft Office PowerPoint that allows an unauthenticated local attacker to execute arb
Microsoft Excel Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentica
Microsoft Word Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authenticat
Microsoft Office Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentic
Same weakness CWE-125 – Out-of-bounds Read
View allShare
External POC / Exploit Code
Leaving vuln.today