EUVD-2026-80216Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable gNSI service with high management privileges required (PR:H); command injection escapes the service context to root, changing scope (S:C) with full C/I/A loss.
Primary rating from Vendor (Arista).
CVSS VectorVendor: Arista
Lifecycle Timeline
6DescriptionCVE.org
A privileged attacker can exploit certain operation to execute arbitrary commands with root privileges, leading to full device compromise. An authenticated user can exploit gRPC Network Security Interface (gNSI) Certz service on Arista EOS-based products to escalate privileges and execute arbitrary OS commands via a crafted Certz Rotate request. The Bootz service is also affected.
AnalysisAI
Command injection in Arista EOS-based products lets an authenticated user of the gRPC Network Security Interface (gNSI) Certz service escalate privileges and run arbitrary OS commands as root by sending a crafted Certz Rotate request, resulting in full device compromise; the Bootz service is affected by the same flaw. The issue is a CWE-78 OS command injection reported by Arista and carries a CVSS 4.0 base score of 9.4. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires authenticated, privileged (PR:H) access to the EOS management plane and network reachability to the gNSI (gRPC Network Security Interface) Certz service; the attacker sends a crafted Certz Rotate request, or an equivalent request to the Bootz service. … 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:H/VA:H/SC:H/SI:H/SA:H, score 9.4) describes a network-reachable, low-complexity attack requiring high privileges but no user interaction, with total confidentiality, integrity and availability loss on both the vulnerable and subsequent systems - consistent with root-level device takeover. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Patch available per vendor advisory - upgrade to the fixed EOS maintenance release for your train as documented in Arista Security Advisory 0162 (https://www.arista.com/en/support/advisories-notices/security-advisory/24718-security-advisory-0162); the exact fixed build was not enumerated in the provided data, so confirm the target version against that advisory before scheduling the upgrade. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit all users with administrative and network management service access on Arista devices; apply principle of least privilege and revoke unnecessary credentials. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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