EUVD-2026-34903
GHSA-533r-r386-qc78
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
1DescriptionCVE.org
An encrypted password command injection vulnerability exists in the Captive Portal application framework of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). This issue uniquely affects version 17.4.0; earlier software releases are not exposed.
AnalysisAI
Command injection in Arista Edge Threat Management Next Generation Firewall (NGFW) version 17.4.0 allows authenticated high-privileged remote attackers to inject OS commands through the Captive Portal application framework via encrypted password handling. The flaw is unique to release 17.4.0 with earlier versions unaffected, and no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Target must be running exactly Arista NGFW version 17.4.0 with the Captive Portal application framework deployed and reachable by the attacker. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L) shows network reach with low attack complexity but high privileges required, materially limiting blast radius - an attacker already needs admin-tier access to the NGFW management surface. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained or compromised a high-privileged NGFW administrator account (for example via phishing, credential reuse, or insider access) reaches the management interface over the network and submits a crafted payload through the Captive Portal encrypted password handling path. The injected shell metacharacters execute in the context of the captive portal service, allowing the attacker to read sensitive firewall configuration, captured credentials, or portal session data. … |
| Remediation | Consult the Arista security advisory at https://www.arista.com/en/support/advisories-notices/security-advisory/22867-security-advisory-0133 for the fixed release - patch availability per vendor advisory but an exact fixed version was not provided in the input data. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Arista NGFW v17.4.0 deployments and restrict administrative access to essential personnel only. …
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