How severe is CVE-2025-2767?

CVE-2025-2767 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-2767 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-2767?

CVE-2025-2767 affects Arista Ng Firewall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-2767?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-2767 have an EU (EUVD) identifier?

Yes. CVE-2025-2767 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12176.

When was CVE-2025-2767 published?

CVE-2025-2767 was published on 2025-04-23 and last updated on 2026-06-17.

CVE-2025-2767

CVE-2025-2767 is a critical-severity vulnerability in Arista Ng Firewall with a CVSS 3.x base score of 9.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.6)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-12176
Weakness: CWE-79
Affected product: Arista Ng Firewall
Published: 2025-04-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2025-2767?: 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.
How severe is CVE-2025-2767?: CVE-2025-2767 has a CVSS 3.x base score of 9.6, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-2767 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-2767?: CVE-2025-2767 affects Arista Ng Firewall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-2767?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-2767 have an EU (EUVD) identifier?: Yes. CVE-2025-2767 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-12176.
When was CVE-2025-2767 published?: CVE-2025-2767 was published on 2025-04-23 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-25-181/

Affected products (1)

cpe:2.3:a:arista:ng_firewall:17.1.1:*:*:*:*:*:*:*

More vulnerabilities in Arista Ng Firewall

CVE-2024-9188 — High (CVSS 8.8): Specially constructed queries cause cross platform scripting leaking administrator tokens
CVE-2024-12829 — High (CVSS 8.8): Arista NG Firewall ExecManagerImpl Command Injection Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2024-27889 — High (CVSS 8.8): Multiple SQL Injection vulnerabilities exist in the reporting application of the Arista Edge Threat Management - Arista…
CVE-2024-9134 — High (CVSS 8.3): Multiple SQL Injection vulnerabilities exist in the reporting application. A user with advanced report application…
CVE-2024-47519 — High (CVSS 8.3): Backup uploads to ETM subject to man-in-the-middle interception
CVE-2024-9132 — High (CVSS 8.1): The administrator is able to configure an insecure captive portal script

All CVEs affecting Arista Ng Firewall →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →