CVE-2009-2056
UnknownEPSS 1.34%
Last modified
CVE-2009-2056 is a vulnerability of currently unknown severity. Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.
Description
Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | <= 3.8.1 |
| Cisco | Ios Xr | 3.0 |
| Cisco | Ios Xr | 3.0.1 |
| Cisco | Ios Xr | 3.1 |
| Cisco | Ios Xr | 3.1.0 |
| Cisco | Ios Xr | 3.2 |
| Cisco | Ios Xr | 3.2.1 |
| Cisco | Ios Xr | 3.2.2 |
| Cisco | Ios Xr | 3.2.3 |
| Cisco | Ios Xr | 3.2.4 |
| Cisco | Ios Xr | 3.2.50 |
| Cisco | Ios Xr | 3.3 |
| Cisco | Ios Xr | 3.4 |
| Cisco | Ios Xr | 3.4.0 |
| Cisco | Ios Xr | 3.4.1 |
| Cisco | Ios Xr | 3.4.2 |
| Cisco | Ios Xr | 3.4.3 |
| Cisco | Ios Xr | 3.5 |
| Cisco | Ios Xr | 3.5.2 |
| Cisco | Ios Xr | 3.5.3 |
| Cisco | Ios Xr | 3.5.4 |
| Cisco | Ios Xr | 3.6 |
| Cisco | Ios Xr | 3.6.0 |
| Cisco | Ios Xr | 3.6.1 |
| Cisco | Ios Xr | 3.6.2 |
| Cisco | Ios Xr | 3.6.3 |
| Cisco | Ios Xr | 3.7 |
| Cisco | Ios Xr | 3.7.0 |
| Cisco | Ios Xr | 3.7.1 |
| Cisco | Ios Xr | 3.7.2 |
| Cisco | Ios Xr | 3.7.3 |
| Cisco | Ios Xr | 3.8.0 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2009-2056?
Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.
How severe is CVE-2009-2056?
Severity scoring for CVE-2009-2056 is pending analysis. The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.
How do I fix CVE-2009-2056?
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-2009-2056?
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Scan your code nowSource: NVD / NIST