CVE-2025-6188 Security feature bypass in EOS
Attackers can bypass security controls by sending malicious UDP packets with source port 3503, causing unexpected behavior in unauthenticated services.
- 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-2025-6188?
CVE-2025-6188 is a high-severity vulnerability in Arista Networks EOS, published on 25 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2025-6188?
How do I fix CVE-2025-6188?
No fix has been published for CVE-2025-6188 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-6188 being exploited?
There is no known exploitation of CVE-2025-6188 in the wild and no public exploit code.
Sources
Also known as GHSA-hjjq-j76f-mvq4.