Description

On affected platforms with hardware IPSec support running Arista EOS with IPsec enabled and anti-replay protection configured, EOS may exhibit unexpected behavior in specific cases. Received duplicate encrypted packets, which should be dropped under normal anti-replay protection, will instead be forwarded due to this vulnerability.

Note: this issue does not affect VXLANSec or MACSec encryption functionality.

Classification

CVE ID: CVE-2025-2796

CVSS Base Severity: MEDIUM

CVSS Base Score: 5.3

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected Products

Vendor: Arista Networks

Product: EOS

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 4.11% (scored less or equal to compared to others)

EPSS Date: 2025-06-17 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-2796
https://www.arista.com/en/support/advisories-notices/security-advisory/21413-security-advisory-0119

Timeline