🛡️ CVE-2026-55050 — 365-apps

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-125 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-55050 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-55050 is recorded against 8 packages.

  • 365-apps
  • microsoft-365
  • office-2019
  • office-2021
  • office-2024
  • office-online-server (fixed in 16.0.10417.20175)
  • sharepoint-server
  • word

Timeline and source

Published on 14 July 2026 and last revised on 16 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2026-07-14
Updated 2026-08-11
Modified 2026-07-16
Fix URL N/A

Affected Packages

Software From version Fixed in
365-apps — —
microsoft-365 — —
office-2019 — —
office-2021 — —
office-2024 — —
office-online-server — 16.0.10417.20175
sharepoint-server — —
word — —

Similar Threats

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