{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2024-27891 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2024-27891 yet. Limit exposure of the affected software until one is available.","what":"CVE-2024-27891 is a medium-severity vulnerability in Arista Networks EOS, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2024-27891 and fix it if it is affected.\n\nWhat it is: CVE-2024-27891 is a medium-severity vulnerability in Arista Networks EOS, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2024-27891 in the wild and no public exploit code.\n\nAffected product: Arista Networks EOS. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2024-27891/ (Markdown: https://insights.sbomify.com/CVE-2024-27891/index.md)","id":"CVE-2024-27891","markdown":"https://insights.sbomify.com/CVE-2024-27891/index.md","name":"CVE-2024-27891","record":{"aliases":["GHSA-6r39-6chc-xxhc"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Arista EOS","requires_auth":"none","summary":"Attackers can bypass egress ACLs on Arista EOS devices when MACsec is enabled, allowing unauthorized packet transmission.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Arista","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-284","name":"Improper Access Control"}],"description":"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Security feature bypass in EOS","id":"CVE-2024-27891","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2024"},"n_packages":0,"n_references":1,"next":{"headline":"Missing authorization in EOS","id":"CVE-2024-27892"},"packages":[],"prev":{"headline":"Missing authorization in EOS","id":"CVE-2024-27890"},"products":["EOS"],"published":"2026-06-04","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-05","vendors":["Arista Networks"]},"summary":"Attackers can bypass egress ACLs on Arista EOS devices when MACsec is enabled, allowing unauthorized packet transmission.","url":"https://insights.sbomify.com/CVE-2024-27891/"}