CVE-2026-55140
Microsoft Office Remote Code Execution Vulnerability
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 16.0.5561.1000, 16.111.26071215
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Microsoft Microsoft 365 Apps for Enterprise
From 16.0.1
- Microsoft Microsoft Office 2016
From 16.0.0 · fixed in 16.0.5561.1000
- Microsoft Microsoft Office 2019
From 19.0.0
- Microsoft Microsoft Office 365 for Mac
From 1.0.0 · fixed in 16.111.26071215
- Microsoft Microsoft Office LTSC 2021
From 16.0.1
- Microsoft Microsoft Office LTSC 2024
From 16.0.0
- Microsoft Microsoft Office LTSC for Mac 2021
From 16.0.1 · fixed in 16.111.26071215
- Microsoft Microsoft Office LTSC for Mac 2024
From 16.0.0 · fixed in 16.111.26071215