CVE catalog
CVE-2026-26154
Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.06% · Oct 25, 2026
Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | windows_server_2012 | Not reported | Not reported | unknown |
| Cpe | windows_server_2016 | Not reported | 10.0.14393.9060 | fixed |
| Cpe | windows_server_2019 | Not reported | 10.0.17763.8644 | fixed |
| Cpe | windows_server_2022 | Not reported | 10.0.20348.5020 | fixed |
| Cpe | windows_server_2022_23h2 | Not reported | 10.0.25398.2274 | fixed |
| Cpe | windows_server_2025 | Not reported | 10.0.26100.32690 | fixed |
| Cpe | windows_server_2012 | Not reported | Not reported | unknown |
| Cpe | windows_server_2016 | Not reported | 10.0.14393.9060 | fixed |
| Cpe | windows_server_2019 | Not reported | 10.0.17763.8644 | fixed |
| Cpe | windows_server_2022 | Not reported | 10.0.20348.5020 | fixed |
| Cpe | windows_server_2022_23h2 | Not reported | 10.0.25398.2274 | fixed |
| Cpe | windows_server_2025 | Not reported | 10.0.26100.32690 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | windows_server_2016 | cpe | Not reported | 10.0.14393.9060 | Not reported | Not reported | Not reported |
| Cpe | windows_server_2019 | cpe | Not reported | 10.0.17763.8644 | Not reported | Not reported | Not reported |
| Cpe | windows_server_2022 | cpe | Not reported | 10.0.20348.5020 | Not reported | Not reported | Not reported |
| Cpe | windows_server_2022_23h2 | cpe | Not reported | 10.0.25398.2274 | Not reported | Not reported | Not reported |
| Cpe | windows_server_2025 | cpe | Not reported | 10.0.26100.32690 | Not reported | Not reported | Not reported |
| Cpe | windows_server_2016 | cpe | Not reported | 10.0.14393.9060 | Not reported | NVD-CVE-2026-26154 | Not reported |
| Cpe | windows_server_2019 | cpe | Not reported | 10.0.17763.8644 | Not reported | NVD-CVE-2026-26154 | Not reported |
| Cpe | windows_server_2022 | cpe | Not reported | 10.0.20348.5020 | Not reported | NVD-CVE-2026-26154 | Not reported |
| Cpe | windows_server_2022_23h2 | cpe | Not reported | 10.0.25398.2274 | Not reported | NVD-CVE-2026-26154 | Not reported |
| Cpe | windows_server_2025 | cpe | Not reported | 10.0.26100.32690 | Not reported | NVD-CVE-2026-26154 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: