CVE-2013-1121
CVE-2013-1121 is a medium-severity vulnerability in Cisco Nx-os with a CVSS 2.0 base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.4)
- EPSS exploit prediction: 1% (60th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-399
- Affected product: Cisco Nx-os
- Published:
- Last modified:
Description
The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.
Frequently asked questions
- What is CVE-2013-1121?
- The regex engine in the BGP implementation in Cisco NX-OS, when a complex regular expression is configured for inbound routes, allows remote attackers to cause a denial of service (device reload) via a crafted AS path set, aka Bug ID CSCuf49554.
- How severe is CVE-2013-1121?
- CVE-2013-1121 has a CVSS 2.0 base score of 5.4, rated medium severity.
- Is CVE-2013-1121 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2013-1121?
- CVE-2013-1121 affects Cisco Nx-os. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2013-1121?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2013-1121 published?
- CVE-2013-1121 was published on 2013-09-19 and last updated on 2026-06-16.
References
Affected products (1)
- cpe:2.3:o:cisco:nx-os:-:*:*:*:*:*:*:*
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