CVE-2025-2796 Security feature bypass in EOS
Attackers can bypass IPsec anti-replay protection on Arista EOS devices, causing duplicate encrypted packets to be forwarded instead of dropped.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-2796?
CVE-2025-2796 is a medium-severity vulnerability in Arista Networks EOS, published on 27 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-2796?
How do I fix CVE-2025-2796?
No fix has been published for CVE-2025-2796 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-2796 being exploited?
There is no known exploitation of CVE-2025-2796 in the wild and no public exploit code.
Sources
Also known as GHSA-2pf3-qwcm-2m4r.