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Vulnerabilities

Vulnerability · CVE-2025-2767

Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability.

Published Apr 23, 2025 · catalog updated Apr 23, 2025 · Arista NG Firewall

Check if you run it

No confirmed exploitation is on record for CVE-2025-2767. EPSS is 0.64%. Act only if a listed version of Arista NG Firewall is installed.

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.64%
Remediation
Vendor / distro source
Affected products
vendor Arista NG Firewall 17.1.1

Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability. The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper validation of user-supplied data, which can lead to the injection of an arbitrary script. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-24407.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Arista NG Firewall 17.1.117.1.1

How to fix CVE-2025-2767

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-2767. EPSS is 0.64%. Act only if a listed version of Arista NG Firewall is installed.

Which versions are affected?

Compare what you have installed with Arista NG Firewall 17.1.1 17.1.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 23, 2025 · EUVD

    Detected

    Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability. The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper valida

  2. Apr 23, 2025 · EUVD

    Updated

    Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability. The specific flaw exists within the processing of the User-Agent HTTP header. The issue results from the lack of proper valida

Sources

  • FIRST EPSSExploitation probabilityCVE-2025-2767

    30-day exploitation probability 0.6%

    first.org
  • EUVDVulnerability recordEUVD-2025-12176

    Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Arista NG Firewall. Minimal user interaction is required to exploit this vulnerability. The sp

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.