How severe is CVE-2025-53139?

CVE-2025-53139 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-53139 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-53139?

CVE-2025-53139 primarily affects Microsoft Windows 10 21h2. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-53139?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-53139 have an EU (EUVD) identifier?

Yes. CVE-2025-53139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34349.

When was CVE-2025-53139 published?

CVE-2025-53139 was published on 2025-10-14 and last updated on 2026-06-17.

CVE-2025-53139

CVE-2025-53139 is a high-severity vulnerability in Microsoft Windows 10 21h2 with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-319.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34349
Weakness: CWE-319
Affected product: Microsoft Windows 10 21h2
Published: 2025-10-14
Last modified: 2026-06-17

Description

Cleartext transmission of sensitive information in Windows Hello allows an unauthorized attacker to bypass a security feature locally.

Frequently asked questions

What is CVE-2025-53139?: Cleartext transmission of sensitive information in Windows Hello allows an unauthorized attacker to bypass a security feature locally.
How severe is CVE-2025-53139?: CVE-2025-53139 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-53139 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-53139?: CVE-2025-53139 primarily affects Microsoft Windows 10 21h2. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-53139?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-53139 have an EU (EUVD) identifier?: Yes. CVE-2025-53139 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34349.
When was CVE-2025-53139 published?: CVE-2025-53139 was published on 2025-10-14 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53139

Affected products (7)

cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*

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