CVE-2009-2049
MEDIUMEPSS 83th pctlDescription
Cisco IOS 12.0(32)S12 through 12.0(32)S13 and 12.0(33)S3 through 12.0(33)S4, 12.0(32)SY8 through 12.0(32)SY9, 12.2(33)SXI1 through 12.2(33)SXI2, 12.2XNC before 12.2(33)XNC2, 12.2XND before 12.2(33)XND1, and 12.4(24)T1; and IOS XE 2.3 through 2.3.1t and 2.4 through 2.4.0; when RFC4893 BGP routing is enabled, allows remote attackers to cause a denial of service (device reload) by using an RFC4271 peer to send a malformed update, aka Bug ID CSCta33973.
How to fix
No published remediation has been found for this vulnerability's affected products yet.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Elevated risk: more likely to be exploited than 83% of all known CVEs.
References
Related Vulnerabilities
Other CWE-16 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2004-2687 | High | 9.3 | 88% | - | Fix |
| CVE-2009-2335 | Medium | 5.0 | 85% | - | Fix |
| CVE-2006-3677 | High | 7.5 | 78% | - | Fix |
| CVE-2011-4404 | Medium | 5.0 | 60% | - | - |
| CVE-2006-0848 | Medium | 5.1 | 58% | - | - |
| CVE-2007-3898 | Medium | 6.4 | 52% | - | - |
Common questions
How do I fix CVE-2009-2049?
No published fix for CVE-2009-2049 has been found yet. Check the linked vendor advisories for guidance as it becomes available.
Is CVE-2009-2049 being actively exploited?
Not that we know of. CVE-2009-2049 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.4% is the estimated probability that it will be exploited in the next 30 days. That is higher than 83% of all scored CVEs.
How severe is CVE-2009-2049?
CVE-2009-2049 has a CVSS v2 base score of 5.4, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
Embed a live status badge for CVE-2009-2049
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.