CVE-2025-26642
Published: 08 April 2025
Summary
CVE-2025-26642 is a high-severity Out-of-bounds Read (CWE-125) vulnerability in Microsoft Office Long Term Servicing Channel. Its CVSS base score is 7.8 (High).
Operationally, ranked in the top 33.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-26642 is an out-of-bounds read vulnerability, tracked under CWE-125 and CWE-190, that affects Microsoft Office and permits local code execution. The flaw carries a CVSS 3.1 base score of 7.8 with the vector AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating that successful exploitation can fully compromise confidentiality, integrity, and availability on the affected system.
An unauthorized attacker can trigger the issue by supplying a malicious file that a user opens in Microsoft Office. Because the attack requires local access and user interaction but no privileges, an adversary who convinces a target to process the crafted document can achieve arbitrary code execution in the context of the current user.
The Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26642 is the authoritative source for patch availability and mitigation guidance.
EPSS for the CVE rose from a low baseline to a recorded peak of 0.0101, indicating that exploitation interest increased after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-10227
Vulnerability details
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.