Ng Firewall
CVE-2025-2767
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.6 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.50%. |
| Exploit ScenarioDerived | A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 28, 2026
Arista NG Firewall User-Agent Cross-Site Scripting Remote Code Execution Vulnerability. Rated critical severity (CVSS 9.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Arista Ng Firewall.
Know when Ng Firewall gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
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.
Executive ViewAI
CVE-2025-2767 presents critical security risk, a cross-site scripting vulnerability rated CVSS 9.6. Attackers could inject malicious scripts to steal user sessions, credentials, or perform actions on behalf of authenticated users. Organizations should apply vendor updates immediately when available and implement compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Implement Content-Security-Policy headers; (2) Enable HttpOnly and SameSite cookie attributes; (3) Deploy WAF XSS/CSRF rules.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
More in Ng Firewall
View allArista NG Firewall ExecManagerImpl Command Injection Remote Code Execution Vulnerability. Rated high severity (CVSS 8.8)
Multiple SQL Injection vulnerabilities exist in the reporting application of the Arista Edge Threat Management - Arista
Arista NG Firewall uvm_login Incorrect Authorization Privilege Escalation Vulnerability. Rated high severity (CVSS 7.8),
Arista NG Firewall custom_handler Directory Traversal Remote Code Execution Vulnerability. Rated high severity (CVSS 7.3
The Untangle NG firewall 14.2.0 is vulnerable to an authenticated command injection when logged in as an admin user. Rat
The Untangle NG firewall 14.2.0 is vulnerable to authenticated inline-query SQL injection within the timeDataDynamicColu
Command injection in Arista Edge Threat Management Next Generation Firewall (NGFW) Captive Portal Custom Handler allows
Command injection in Arista Edge Threat Management Next Generation Firewall (NGFW) version 17.4.0 allows authenticated h
Authenticated command injection in Arista Edge Threat Management Next Generation Firewall (NGFW) allows administrators w
Command injection in Arista Edge Threat Management Next Generation Firewall (NGFW) version 17.4.0 allows high-privileged
Arista NG Firewall ReportEntry SQL Injection Arbitrary File Read and Write Vulnerability. Rated medium severity (CVSS 6.
Cross-site scripting in the Arista Edge Threat Management Next Generation Firewall web UI dashboard allows a high-privil
GitHub PoC
Exploit-DB