CVE-2025-48799Windows Update Service Elevation of Privilege Vulnerability
- 7.8HighCVSS base score
- 1.4%Exploitation in 30 daysEPSS · top 28% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Improper link resolution before file access ('link following') in Windows Update Service allows an authorized attacker to elevate privileges locally.
Timeline
ID reserved
By microsoft
- 43 days later
· 43 days later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| microsoftCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.4% · top 28% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
Microsoft · Windows 10 Version 1607
- affected 10.0.14393.0 – < 10.0.14393.8246
Microsoft · Windows 10 Version 1809
- affected 10.0.17763.0 – < 10.0.17763.7558
Microsoft · Windows 10 Version 21H2
- affected 10.0.19044.0 – < 10.0.19044.6093
Microsoft · Windows 10 Version 22H2
- affected 10.0.19045.0 – < 10.0.19045.6093
Microsoft · Windows 11 version 22H2
- affected 10.0.22621.0 – < 10.0.22621.5624
Microsoft · Windows 11 version 22H3
- affected 10.0.22631.0 – < 10.0.22631.5624
Microsoft · Windows 11 Version 23H2
- affected 10.0.22631.0 – < 10.0.22631.5624
Microsoft · Windows 11 Version 24H2
- affected 10.0.26100.0 – < 10.0.26100.4652
Microsoft · Windows Server 2025
- affected 10.0.26100.0 – < 10.0.26100.4652
Microsoft · Windows Server 2025 (Server Core installation)
- affected 10.0.26100.0 – < 10.0.26100.4652
References
References3
- Windows Update Service Elevation of Privilege Vulnerability (opens in a new tab)vendor-advisorypatch
- https://www.vicarius.io/vsociety/posts/cve-2025-48799-mitigation-script-elevation-of-privilege-vulnerability-in-windows-update-service (opens in a new tab)
- https://www.vicarius.io/vsociety/posts/cve-2025-48799-detection-script-elevation-of-privilege-vulnerability-in-windows-update-service (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-20603 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-48799)Record last updated .