CVE-2024-27891

mediumpriority · track · 0EPSS 0.003 · 21 %ileDEEU

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (21st) EPSS

CVSS 5.3 · medium

Is it mine?

16 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-28

On affected platforms running Arista EOS with MACsec and egress ACLs configured on the same interfaces, the ACL policies may not be enforced for packets egressing on those ports. This can cause outgoing packets to incorrectly be allowed or denied.

cvss

Technical severity, 0–10. One row per scoring source.

6.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.7–6.9

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Nsecondary · psirt@arista.comexploitability 3.9 · impact 1.4

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.06.9mediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/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:Xsecondary · psirt@arista.com

v4.02.7lowCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284US

affected products (16)

Products and version ranges known to be affected.

Arista EOS <4.28.11Mall versionscert_bundDE
Arista EOS <4.29.8Mall versionscert_bundDE
Arista EOS <4.30.7Mall versionscert_bundDE
Arista EOS <4.31.3Mall versionscert_bundDE
Arista EOS <4.32.1Fall versionscert_bundDE
Arista EOS< 4.28.11Mcert_bundDE
Arista EOS< 4.29.8Mcert_bundDE
Arista EOS< 4.30.7Mcert_bundDE
Arista EOS< 4.31.3Mcert_bundDE
Arista EOS< 4.32.1Fcert_bundDE
Arista Networks EOS≤ 4.30.0 ≤4.30.6Menisa_euvdEU
Arista Networks EOS≤ 4.28.0 ≤4.28.10.1Menisa_euvdEU
Arista Networks EOS≤ 4.32.0 ≤4.32.0.1Fenisa_euvdEU
Arista Networks EOS≤ 4.29.0 ≤4.29.7Menisa_euvdEU
Arista Networks EOS≤ 4.31.0 ≤4.31.2Fenisa_euvdEU
Arista Networks EOS4.27.2F → 4.28.0enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-1695Arista EOS: Mehrere Schwachstellen ermöglichen Umgehen von SicherheitsvorkehrungenDeutsch2024-07-23csaf · cert_bundDE
Ein entfernter, anonymer Angreifer oder ein Angreifer aus dem angrenzenden Netzwerk kann mehrere Schwachstellen in Arista EOS ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-06-04modified 2026-07-22

references (3)

External citations — patches, advisories, analysis.

scry

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