CVE-2025-21203
MEDIUMCVSS 6.5/10EPSS 1.34%
Last modified
CVE-2025-21203 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.
Description
Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows Server 2008 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | r2 | Sp1 |
| Microsoft | Windows Server 2012 | All versions | — |
| Microsoft | Windows Server 2012 | r2 | — |
| Microsoft | Windows Server 2016 | < 10.0.14393.7969 | — |
| Microsoft | Windows Server 2019 | < 10.0.17763.7136 | — |
| Microsoft | Windows Server 2022 | < 10.0.20348.3453 | — |
| Microsoft | Windows Server 2022 23h2 | < 10.0.25398.1551 | — |
| Microsoft | Windows Server 2025 | < 10.0.26100.3775 | — |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-21203?
Buffer over-read in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to disclose information over a network.
How severe is CVE-2025-21203?
CVE-2025-21203 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.
How do I fix CVE-2025-21203?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2025-21203?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST