Vulnerability · CVE-2025-54918
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Published Sep 9, 2025 · catalog updated Feb 20, 2026 · Microsoft Windows Server 2019 (Server Core installation)
Last checked Oct 29, 2026. A connected source was read within the last 7 days.
Check this week
CVE-2025-54918 is not in CISA KEV. FIRST estimates a 25.28% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows Server 2019 (Server Core installation).
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-20937 · Medium
- CVE-2026-20867 · High
- CVE-2026-20862 · Medium
- CVE-2025-62208 · Medium
- CVE-2025-62452 · High
- Severity
- High8.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 25.28%
- Remediation
- Version ranges on file
- Affected products
- vendor Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.7792
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.779210.0.17763.0 <10.0.17763.7792
How to fix CVE-2025-54918
Upgrade
CVE-2025-54918 lists a fix boundary at 10.0.17763.7792. Compare the installed build with that boundary before you change production.
Version check
Seen in 10.0.17763.0 <10.0.17763.7792
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2025-54918 is not in CISA KEV. FIRST estimates a 25.28% chance of exploitation in the next 30 days. Check whether you run Microsoft Windows Server 2019 (Server Core installation).
Which versions are affected?
Compare what you have installed with Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.7792 10.0.17763.0 <10.0.17763.7792. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 25.28%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Technology hubs
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 9, 2025 · EUVD
Detected
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Feb 20, 2026 · EUVD
Updated
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Sources
- CVE.orgVulnerability recordCVE-2025-54918
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-54918
30-day exploitation probability 25.28%
first.org - EUVDVulnerability recordEUVD-2025-27346
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 23, 2026
- CVE.orgOct 22, 2026
- EUVDOct 22, 2026