VulnerabilityAnalyzed
CVE-2026-21261
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
MEDIUM 5.5EPSS 0.62%
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 0.62% probability · 48th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- microsoft/365 apps · microsoft/excel · microsoft/office · microsoft/office long term servicing channel · microsoft/office online server
- Source
- secure@microsoft.com
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.