CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immediately crash the Internet Group Management Protocol (IGMP) process or make it consume available memory and eventually crash. The memory consumption may negatively impact other processes that are running on the device. These vulnerabilities are due to the incorrect handling of IGMP packets. An attacker could exploit these vulnerabilities by sending crafted IGMP traffic to an affected device. A successful exploit could allow the attacker to immediately crash the IGMP process or cause memory exhaustion, resulting in other processes becoming unstable. These processes may include, but are not limited to, interior and exterior routing protocols. Cisco will release software updates that address these vulnerabilities.
Affected products
cisco: ios xr; cisco: asr 9000v; cisco: asr 9001; cisco: asr 9006; cisco: asr 9010; cisco: asr 9901; cisco: asr 9903; cisco: asr 9904; cisco: asr 9906; cisco: asr 9910; cisco: asr 9912; cisco: asr 9922; cisco: ncs 5001; cisco: ncs 5002; cisco: ncs 5011
References3
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… MitigationVendor Advisory
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/c… MitigationVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H - EPSS — exploit probability
- 3% percentile: 89 · as of 2 November 2026
- CWE
- CWE-400CWE-770