CVE-2026-73468: CWE-670 Always-Incorrect Control Flow Implementation in Arista Networks EOS
CVE-2026-73468 is a vulnerability in Arista Networks EOS where a specially crafted packet can cause premature expiry of multicast forwarding state on affected interfaces. This may lead to temporary loss of multicast traffic during the affected period. The issue is due to an always-incorrect control flow implementation (CWE-670). The vulnerability has a medium severity with a CVSS score of 6.5 and affects multiple EOS versions prior to certain fixed releases. No known exploits are reported in the wild and no official patch information is provided in the input data.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-73468) in Arista Networks EOS involves an incorrect control flow implementation (CWE-670) that allows a specially crafted packet to prematurely expire multicast forwarding state on affected interfaces. This results in temporary multicast traffic loss during the affected period. The CVSS 3.1 score is 6.5 (medium severity), with attack vector being adjacent network (AV:A), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality or integrity impact (C:N/I:N), and high availability impact (A:H). The affected versions include EOS versions from 1.0.0 up to and including 4.36.1F in various subranges. There are no known exploits in the wild and no vendor advisory or patch links provided in the input data.
Potential Impact
The vulnerability causes temporary loss of multicast traffic on affected interfaces due to premature expiry of multicast forwarding state. There is no impact on confidentiality or integrity, but availability is affected. This can disrupt network operations relying on multicast traffic during the affected period.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or workaround information is provided in the input data. Monitor Arista Networks advisories for updates and apply patches when available.
CVE-2026-73468: CWE-670 Always-Incorrect Control Flow Implementation in Arista Networks EOS
Description
CVE-2026-73468 is a vulnerability in Arista Networks EOS where a specially crafted packet can cause premature expiry of multicast forwarding state on affected interfaces. This may lead to temporary loss of multicast traffic during the affected period. The issue is due to an always-incorrect control flow implementation (CWE-670). The vulnerability has a medium severity with a CVSS score of 6.5 and affects multiple EOS versions prior to certain fixed releases. No known exploits are reported in the wild and no official patch information is provided in the input data.
CVSS v3.1
Score 6.5medium
Affected software
Arista Networks
EOS
pkg:github/arista-networks/eosRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-73468) in Arista Networks EOS involves an incorrect control flow implementation (CWE-670) that allows a specially crafted packet to prematurely expire multicast forwarding state on affected interfaces. This results in temporary multicast traffic loss during the affected period. The CVSS 3.1 score is 6.5 (medium severity), with attack vector being adjacent network (AV:A), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), unchanged scope (S:U), no confidentiality or integrity impact (C:N/I:N), and high availability impact (A:H). The affected versions include EOS versions from 1.0.0 up to and including 4.36.1F in various subranges. There are no known exploits in the wild and no vendor advisory or patch links provided in the input data.
Potential Impact
The vulnerability causes temporary loss of multicast traffic on affected interfaces due to premature expiry of multicast forwarding state. There is no impact on confidentiality or integrity, but availability is affected. This can disrupt network operations relying on multicast traffic during the affected period.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official patch or workaround information is provided in the input data. Monitor Arista Networks advisories for updates and apply patches when available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Arista
- Date Reserved
- 2026-08-12T16:47:18.121Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaa692755bf5e2cf553d91a
Added to database: 09/16/2026, 10:02:15 UTC
Last enriched: 09/16/2026, 10:16:40 UTC
Last updated: 09/16/2026, 10:25:21 UTC
Views: 5
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