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VulnerabilityPublished

CVE-2026-75944: Arista Networks EOS · Incomplete Cleanup

Affects Arista Networks EOSSource CVE Database V5

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Not known to be exploited · CVSS 2.6 Low.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
2.6Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 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 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Arista NetworksEOSAffected
  • >=4.36.0 <=4.36.1F
Fixed in–

AI-suggested

Since the issue requires an administrator to restart the AclAgent for the stale ACL to be applied, avoiding unnecessary restarts can mitigate the risk. Monitor vendor advisories for any forthcoming patches or updates.

Description

CVE-2026-75944 is a low-severity vulnerability in Arista Networks EOS where a race condition during supplicant re-authentication can cause a stale ACL entry to persist. If the AclAgent service is restarted by an administrator, this stale ACL entry may be applied incorrectly to new supplicants, leading to improper access control enforcement. This issue requires manual intervention (an AclAgent restart) to manifest.

References

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