CVE-2026-55131

HighCVSS 7.8/10Last modified Jul 15, 2026

Description

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

No affected versions have been published.

Timeline

Published
Jul 14, 2026
Last modified
Jul 15, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-551327.8Double free in Microsoft Office Word allows an unauthorized attacker to execute code locally.CVE-2026-551337.8Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code locally.CVE-2026-551347.8Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.CVE-2026-551355.4Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attCVE-2026-551367.8Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally.CVE-2026-551377.8Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.CVE-2026-551385.5Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.CVE-2026-551393.3Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.CVE-2026-551407.8Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.CVE-2026-551417.8Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.CVE-2026-551425.5Numeric truncation error in Microsoft Office Word allows an unauthorized attacker to disclose information locally.CVE-2026-551447.1Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.
CVE-2026-55131: High severity, CVSS 7.8 | Vulnix