← CVE Intelligence

CVE-2026-77190

Security Advisory 0177 PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Arista Networks / EOSaffected 4.36.0F through 4.36.1F; affected 4.35.0F through 4.35.5M; affected 4.34.2F through 4.34.7M

CWE

CWE-20

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.