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Medium severity · published May 27, 2025
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
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EO
EOS · Arista Networks
4.33.0 through 4.33.2F · source: vendor
Affected product
EO
EOS
Arista Networks
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-2796
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-2796
www.arista.com
https://www.arista.com/en/support/advisories-notices/security-advisory/21413-security-advisory-0119
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