CVE-2025-21355CRITICAL 9.8EPSS p76.3%

CVE-2025-21355CVE-2025-21355

Description

Missing Authentication for Critical Function in Microsoft Bing allows an unauthorized attacker to execute code over a network

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS1.69% probability of exploitation · percentile 76.3% · 2026-10-05T12:00:23Z
Published2025-02-19
Last modified2025-03-05

Underlying weaknesses· 1

CWE-306

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21355

1

TypeTargetConfidenceTier
WeaknessMissing Authentication for Critical Functioncwe-3060%live

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