CVE tracker / CVE-2026-55050
CVE-2026-55050
CVE-2026-55050 is the Microsoft Word Information Disclosure Vulnerability. Microsoft rates it Important, CVSS 5.5. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 14, 2026.
Risk summary
MediumInformation Disclosure
5.5
CVSS v3 base
0.6%
EPSS: chance of exploitation in 30 days
Medium
Severity
Important
Microsoft's rating
No
In CISA KEV
Microsoft describes it: “Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information locally.”
How to fix it
Microsoft lists 16 affected products and the update that fixes each:
- KB5002882 · fixed build 16.0.19725.20434
Microsoft SharePoint Server Subscription Edition - KB5002883 · fixed build 16.0.10417.20175
Microsoft SharePoint Server 2019 - KB5002890 · fixed build 16.0.5561.1000
Microsoft Word 2016 (64-bit edition), Microsoft Word 2016 (32-bit edition) - KB5002891 · fixed build 16.0.5561.1001
Microsoft SharePoint Enterprise Server 2016 - Click to Run · fixed build https://aka.ms/OfficeSecurityReleases
Microsoft Office LTSC 2021 for 64-bit editions, Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft Office 2019 for 64-bit editions, Microsoft Office 2019 for 32-bit editions, and 3 more - Release Notes · fixed build 16.111.26071215
Microsoft Office LTSC for Mac 2021, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2024
What Microsoft changed
- August 6, 2026: Acknowledgement Updated
- July 14, 2026: Information published.
Details
- Weakness
- CWE-125: Out-of-bounds Read
- Publicly disclosed (Microsoft)
- No
- Exploited (Microsoft)
- No
- Known exploited (CISA KEV)
- Not listed
- Published
- July 14, 2026
- Last revised
- August 6, 2026
Get told when this changes
Senserva Watch emails Microsoft security and patch alerts when something moves: a new exploitation report, a revised fix, a known issue. Free, one email address.
References
From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.