Description
On affected platforms running Arista EOS, maliciously formed UDP packets with source port 3503 may be accepted by EOS. UDP Port 3503 is associated with LspPing Echo Reply. This can result in unexpected behaviors, especially for UDP based services that do not perform some form of authentication.
Scores
CVSS v3
7.5
EPSS
0.0004
EPSS Percentile
13.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-290
Status
published
Products (5)
Arista Networks/EOS
4.30.0 - 4.30.9.1M
Arista Networks/EOS
4.31.0 - 4.31.6M
Arista Networks/EOS
4.32.4.0 - 4.32.4.1M
Arista Networks/EOS
4.33.0 - 4.33.1F
Arista Networks/EOS
4.33.1.0 - 4.33.1.2F
Published
Aug 25, 2025
Tracked Since
Feb 18, 2026