VulnerabilityAnalyzed
CVE-2026-55045
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
HIGH 8.4EPSS 0.45%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
- CVSS 3.1
- 8.4 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.45% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- microsoft/365 apps · microsoft/microsoft 365 · microsoft/office 2016 · microsoft/office 2019 · microsoft/office 2021 · microsoft/office 2024 · microsoft/sharepoint server
- Source
- secure@microsoft.com
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55045Vendor Advisory, Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.