CVE-2025-55229

Home/CVE/Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoo

CVE

Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoo

Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.

MEDIUM · CVSS 5.3 EPSS 0.00483

Schedule remediation

SSVC automatable: yes - attacks can be scripted at scale

Sigma rules0 YARA rules0

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Weakness Classification

CWE-347Improper Verification of Cryptographic Signature

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Affected Products & Versions

microsoft windows 10 1507< 10.0.10240.21014
microsoft windows 10 1607< 10.0.14393.8066
microsoft windows 10 1809< 10.0.17763.7314
microsoft windows 10 21h2< 10.0.19044.5854
microsoft windows 10 22h2< 10.0.19045.5854
microsoft windows 11 22h2< 10.0.22621.5335
microsoft windows 11 23h2< 10.0.22631.5335
microsoft windows 11 24h2< 10.0.26100.4061
Show all 13 affected productsmicrosoft windows server 2016< 10.0.14393.8066
microsoft windows server 2019< 10.0.17763.7314
microsoft windows server 2022< 10.0.20348.3630
microsoft windows server 2022 23h2< 10.0.25398.1611
microsoft windows server 2025< 10.0.26100.4061

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Scoring & Timeline

5.3

MEDIUM · CVSS v3.1 · secure@microsoft.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD21 Aug 2025 · 08:15 PM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC triage · cisa-vulnrichment

Exploitation

none

Automatable

yes

Technical impact

partial

SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

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Vendor Advisories

msrcCVE-2025-55229Spoofing

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External lookups - second-class, for what we don’t hold ourselves

NVD CVE.org CISA Vulners Exploit-DB GitHub PoC VulnCheck KEV GreyNoise

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Detection & defense
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Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1

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