Exploitation reportedNot in CISA KEV yetFix available

CVE-2026-25187

Q: Is CVE-2026-25187 actively exploited?

Active exploitation of CVE-2026-25187 has not been confirmed. Its EPSS score was 3.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-25187?

CVE-2026-25187 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Exploitation reported by one source. First attested on 2026-04-19 by GCVE · kevintel.

Published2026-03-10
WeaknessCWE-59

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

Timeline

dates in UTC

2026-03-1018:18CVE publishedNVD
2026-04-1913:49Listed as exploited by GCVEGCVE
2026-04-1913:49Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-25187?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-25187?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Microsoft windows server 2012

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD
—	= r2	no fix published	NVD

Microsoft windows 10 1607

Branch	Affected	Fixed in	Source
10.0	< 10.0.14393.8957	10.0.14393.8957	NVD

Microsoft windows 10 1809

Branch	Affected	Fixed in	Source
10.0	< 10.0.17763.8511	10.0.17763.8511	NVD

11 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

msrc.microsoft.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
GCVEexploitation2026-04-19
CISA-ADPSSVC decisionnone2026-03-10
OpenCVESSVC decisionnone—
CNACVSS 3.17.8read 2026-10-23
CNAweakness (CWE)CWE-59read 2026-10-23
FIRST EPSSEPSS score3.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2026-03-10
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2026-25187?

Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

Is CVE-2026-25187 actively exploited?

Active exploitation of CVE-2026-25187 has not been confirmed. Its EPSS score was 3.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-25187?

CVE-2026-25187 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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