8.8

CVE-2026-81385: microsoft 365_apps Deserialization of Untrusted Data

CVSS: 8.8v3.1HighAnalyzed
Published 08-09-2026Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2026-81385 is a high (CVSS 8.8) Deserialization of Untrusted Data vulnerability in microsoft 365_apps. EPSS estimates a 1.29% chance of exploitation in the next 30 days, higher than 69.8% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
1.29%
0%100%
Low · +0.27 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

Deserialization of untrusted data in Microsoft Office Publisher allows an unauthorized attacker to execute code over a network.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.29%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

+0.27 pp

From 1.02% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.29%

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

Microsoft10 products

1 vendor · 10 products

References

1 links