PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-25621 Arista Networks CVE debrief

CVE-2026-25621 is a HIGH severity vulnerability in Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). The vulnerability exists due to insecure input validation in the Reports application infrastructure, affecting version 17.4.0. Earlier software releases are not exposed. The Common Vulnerability Scoring System (CVSS) score for this vulnerability is 7.0.

Vendor
Arista Networks
Product
Arista Edge Threat Management - Arista Next Generation Firewall (NGFW)
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Administrators and users of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) version 17.4.0 should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by insecure input validation in the Reports application infrastructure of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW). This issue uniquely affects version 17.4.0; earlier software releases are not exposed. The CVSS vector for this vulnerability is 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.

Defensive priority

HIGH

Recommended defensive actions

  • Apply the patch or update to a fixed version of Arista Edge Threat Management - Arista Next Generation Firewall (NGFW) as recommended by the vendor.
  • Refer to the vendor advisory for more information and mitigation strategies: [ref-4](https://www.arista.com/en/support/advisories-notices/security-advisory/23399-security-advisory-0133)

Evidence notes

The vulnerability is classified under CWE-78.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-25621 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-25621

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-25621 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-25621

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.