CVE-2025-53778HIGH 8.8EPSS p98.3%

CVE-2025-53778CVE-2025-53778

Description

Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS36.07% probability of exploitation · percentile 98.3% · 2026-06-18T12:00:27Z
Published2025-08-12
Last modified2025-10-17

Underlying weaknesses· 1

CWE-287

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53778
  2. https://www.vicarius.io/vsociety/posts/cve-2025-53778-detection-script-improper-authentication-vulnerability-affecting-windows-ntlm
  3. https://www.vicarius.io/vsociety/posts/cve-2025-53778-mitigation-script-improper-authentication-vulnerability-affecting-windows-ntlm

1

TypeTargetConfidenceTier
WeaknessImproper Authenticationcwe-2870%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.