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…

Description

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.

Scores

EPSS (exploitation in 30 days)

2.4% · top 16% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.4.

Weakness

• n/a
• CWE-16 (opens in a new tab)All about CWE-16 and its CVEs

Affected products

• n/a

  • affected n/a

References (6)

• 20090729 Cisco IOS Software Border Gateway Protocol 4-Byte Autonomous System Number Vulnerabilities (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
• oval:org.mitre.oval:def:6853 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
• 36046 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• ADV-2009-2082 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• 1022619 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• 35860 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2009-2049](https://trackcve.app/badge/CVE-2009-2049.svg)](https://trackcve.app/cve/CVE-2009-2049)

Record last updated 7 Aug 2024, 05:36 UTC.