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VulnerabilityPublished

CVE-2026-73454: Arista Networks EOS · Command Injection

Affects Arista Networks EOSSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High · fixed in 4.33.0F : patch Arista Networks EOS soon.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.33.0F, 4.32.0F, 4.31.0F
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 31 Oct 2026.

What to do

Upgrade Arista Networks EOS to 4.33.0F, 4.32.0F or 4.31.0F.

Affected software

ProductAffectedFixed in
Arista NetworksEOSAffected
  • >=4.30.0F <4.31.0F
  • >=4.31.0F <4.32.0F
  • >=4.32.0F <4.33.0F
  • >=4.33.0F <=4.33.8M
  • >=4.34.0F <=4.34.7M
  • >=4.35.0F <=4.35.5M
  • >=4.36.0F <=4.36.0.1F
Fixed in
  • 4.33.0F
  • 4.32.0F
  • 4.31.0F

AI-suggested

If you cannot patch yet, restrict access to the gRPC Network Security Interface (gNSI) Credentialz configuration and monitor for unusual account property changes. Follow vendor instructions once patches or updates are released.

Description

CVE-2026-73454 is a command injection vulnerability in Arista Networks EOS affecting platforms with gRPC Network Security Interface (gNSI) Credentialz configured. A specially crafted request can cause unintended changes to account properties, potentially granting elevated privileges beyond intended administrative controls. The vulnerability is rated high severity with a CVSS score of 8.1. Multiple versions of EOS from 4.30.0F through 4.36.0.1F are affected.

References

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