7.8

CVE-2025-62203: microsoft 365_apps Use After Free

CVSS: 7.8v3.1HighAnalyzed
Published 11-11-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-62203 is a high (CVSS 7.8) Use After Free vulnerability in microsoft 365_apps. EPSS estimates a 0.55% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.55%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-11-2025
    PublishedVulnerability first disclosed.
  2. 26-02-2026
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.55%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.04 pp

From 0.51% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.55%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft12 products

1 vendor · 12 products

References

1 links