VulnerabilityAnalyzed
CVE-2025-21377
NTLM Hash Disclosure Spoofing Vulnerability
MEDIUM 6.5EPSS 39.9%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 39.9%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
NTLM Hash Disclosure Spoofing Vulnerability
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 39.93% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-73
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2 · microsoft/windows server 2025
- Source
- secure@microsoft.com
EPSS moved from 39.9% on 24 September 2026 to 39.9% on 2 November 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21377Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.