Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
- Severity
- High7.5CVSS 3.1, High
- Known exploited
- Known exploitedFederal remediation due date: 15 Apr 2022
- Exploit prediction
- 6%
- Published
- 30 Aug 2010Updated 16 Jun 2026 · Last verified 29 Sept 2026
Description
Title, description and vendor guidance are quoted from the source records.
Cisco IOS XR 3.4.0 through 3.9.1, when BGP is enabled, does not properly handle unrecognized transitive attributes, which allows remote attackers to cause a denial of service (peering reset) via a crafted prefix announcement, as demonstrated in the wild in August 2010 with attribute type code 99, aka Bug ID CSCti62211.
Known exploited
Added to CISA KEV on 25 Mar 2022
Federal remediation due date: 15 Apr 2022
Required action: Apply updates per vendor instructions.
Exploit prediction
6% probability of exploitation in the next 30 days (percentile 93%).
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Patcharo shows this vulnerability for information but does not match versions for this product yet.
- n/a n/a · n/a
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Cisco (CVE record)
- Cisco (CVE record) · 29 Sept 2026 at 21:17 UTC · Parser patcharo-cve5/1.1.0
- CISA Known Exploited Vulnerabilities
- CISA Known Exploited Vulnerabilities · 29 Sept 2026 at 21:17 UTC · Parser patcharo-kev/1.0.0
- NVD
- NVD · 27 Sept 2026 at 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 30 Sept 2026 at 00:17 UTC · Parser patcharo-epss/1.0.0
Last verified: 29 Sept 2026 at 21:17 UTC