MEDIUM
CVE-2026-77190
CVSS
6.5
Description
On affected platforms running Arista EOS, an unauthenticated attacker who is network-adjacent to the switch and able to connect to a device with PIM Sparse Mode and MLAG configured, can send malformed messages that cause the Pimsm agent to terminate unexpectedly. The Pimsm agent is automatically restarted, but repeated attacks can cause the agent to restart continuously, resulting in a sustained denial of service.
Weakness (CWE)
CWE-20
Improper Input Validation
EPSS Score
0.28%
Probability of exploitation in next 30 days
20.8th percentile
References
Base CVE data derived from NVD (public domain). Enrichment by
dbcve.org
(CC-BY-4.0). Fetched via API.