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Fencer Vulns
high 7.5

CVE-2025-29842 json

UrlMon Security Feature Bypass Vulnerability

published 2025-05-13 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-14423

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

Acceptance of extraneous untrusted data with trusted data in UrlMon allows an unauthorized attacker to bypass a security feature over a network.

Patch / fix

  • Microsoft Windows 10 Version 1507 10.0.10240.21014
  • Microsoft Windows 10 Version 1607 10.0.14393.8066
  • Microsoft Windows 10 Version 1809 10.0.17763.7314
  • Microsoft Windows 10 Version 21H2 10.0.19044.5854
  • Microsoft Windows 10 Version 22H2 10.0.19045.5854
  • Microsoft Windows 11 version 22H2 10.0.22621.5335
  • Microsoft Windows 11 version 22H3 10.0.22631.5335
  • Microsoft Windows 11 Version 23H2 10.0.22631.5335
  • Microsoft Windows 11 Version 24H2 10.0.26100.4061
  • Microsoft Windows Server 2016 10.0.14393.8066
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.8066
  • Microsoft Windows Server 2019 10.0.17763.7314
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.7314
  • Microsoft Windows Server 2022 10.0.20348.3692
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1611
  • Microsoft Windows Server 2025 10.0.26100.4061
  • Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.4061

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
17 mo ago

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Windows 10 Version 1507
  • Microsoft Windows 10 Version 1607
  • Microsoft Windows 10 Version 1809
  • Microsoft Windows 10 Version 21H2
  • Microsoft Windows 10 Version 22H2
  • Microsoft Windows 11 version 22H2
  • Microsoft Windows 11 version 22H3
  • Microsoft Windows 11 Version 23H2
  • Microsoft Windows 11 Version 24H2
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2022, 23H2 Edition (Server Core installation)
  • Microsoft Windows Server 2025
  • Microsoft Windows Server 2025 (Server Core installation)

Classification

Weakness
  • CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data
  • CWE-345 Insufficient Verification of Data Authenticity

References

Sources

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.