7.8

CVE-2023-21735: microsoft 365_apps Use After Free

CVSS: 7.8v3.1HighModified
Published 10-01-2023Last modified 28-02-2025
Open JSON

Vulnerability summary

CVE-2023-21735 is a high (CVSS 7.8) Use After Free vulnerability in microsoft 365_apps. EPSS estimates a 0.74% chance of exploitation in the next 30 days, higher than 54.1% 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
0.74%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 10-01-2023
    PublishedVulnerability first disclosed.
  2. 28-02-2025
    Last modifiedVulnerability information updated.

Description

Microsoft Office Remote Code Execution Vulnerability

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.74%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

+0.02 pp

From 0.72% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.74%

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

Microsoft6 products

1 vendor · 6 products

References

1 links