Microsoft Excel Remote Code Execution Vulnerability

published 2025-04-08 19 mo ago modified 2026-08-10 2 mo ago also EUVD-2025-10121

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Patch / fix

links 1

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29823 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 19 mo ago (2025-04-08)

Exploit prediction

0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Microsoft 365 Apps for Enterprise

Classification

Weakness

CWE-416 Use After Free

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2025-29823
vendor-advisory, patch

Sources

CVE List CVE-2025-29823
NVD CVE-2025-29823

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary