CVE-2025-2796

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

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.

Remediation

Solution:

  • The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2025-2796 has been fixed in the following releases: * 4.33.3M and later releases in the 4.33.x train

Workaround:

  • There is no known mitigation for CVE-2025-2796. The recommended resolution is to upgrade to a remediated software version at your earliest convenience.
5.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Arista Networks EOS
Published at:
Updated at:

References

Link Tags
https://www.arista.com/en/support/advisories-notices/security-advisory/21413-security-advisory-0119

Frequently Asked Questions

What is the severity of CVE-2025-2796?
CVE-2025-2796 has been scored as a medium severity vulnerability.
How to fix CVE-2025-2796?
To fix CVE-2025-2796: The recommended resolution is to upgrade to a remediated software version at your earliest convenience. Arista recommends customers move to the latest version of each release that contains all the fixes listed below. For more information about upgrading see EOS User Manual: Upgrades and Downgrades https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades CVE-2025-2796 has been fixed in the following releases: * 4.33.3M and later releases in the 4.33.x train
Is CVE-2025-2796 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-2796 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-2796?
CVE-2025-2796 affects Arista Networks EOS.
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