Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Routing Denial of Service Vulnerability
Published Mar 12, 2025
8.6
HIGHCVSS 3.1
EPSS 0.53%
Description
A vulnerability in the Layer 3 multicast feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Services Routers, ASR 9902 Compact High-Performance Routers, and ASR 9903 Compact High-Performance Routers could allow an unauthenticated, remote attacker to cause a line card to reset, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of malformed IPv4 multicast packets that are received on line cards where the interface has either an IPv4 access control list (ACL) or a QoS policy applied. An attacker could exploit this vulnerability by sending crafted IPv4 multicast packets through an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset. Traffic over that line card would be lost while the line card reloads.
Affected products
-
- Version 24.1.1StatusaffectedConstraints-
- Version 24.1.2StatusaffectedConstraints-
- Version 24.2.1StatusaffectedConstraints-
- Version 24.2.2StatusaffectedConstraints-
- Version 24.3.1StatusaffectedConstraints-
- Version 24.3.2StatusaffectedConstraints-
- Version 7.10.2StatusaffectedConstraints-
- Version 7.11.1StatusaffectedConstraints-
- Version 7.11.2StatusaffectedConstraints-
- Version 7.11.21StatusaffectedConstraints-
- Version 7.9.21StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco IOS XR Software | n/a |
|
Running on/with
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 21, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.53% (0.00529) | 42.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00499) | 38.57th | v5 (v2026.06.15) |
| Apr 25, 2026 | 1.25% (0.01247) | 79.37th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.09% (0.00091) | 23.85th | v4 (v2025.03.14) |
| Mar 13, 2025 | 0.05% (0.00046) | 19.89th | v3 (v2023.03.01) |
References (2)
- https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ Not Applicable
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-multicast-ERMrSvq7 Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.apnic.net/2024/09/02/crafting-endless-as-paths-in-bgp/ | Not Applicable | |
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-multicast-ERMrSvq7 | Vendor Advisory |
Change history (0)
No recorded changes yet.