CVE-2026-121368
Last modified
CVE-2026-121368 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. On affected platforms running Arista EOS with Bidirectional Forwarding Detection (BFD) configured to use keyed MD5 or keyed SHA1 authentication, an unauthenticated attacker with network adjacency (direct or multi-hop) to a BFD-enabled interface can send a specially crafted BFD packet resulting in a system reboot.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.
Description
On affected platforms running Arista EOS with Bidirectional Forwarding Detection (BFD) configured to use keyed MD5 or keyed SHA1 authentication, an unauthenticated attacker with network adjacency (direct or multi-hop) to a BFD-enabled interface can send a specially crafted BFD packet resulting in a system reboot.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Arista Networks | EOS | >= 4.36.0F, <= 4.36.2F; >= 4.35.0F, <= 4.35.6M; >= 4.34.0F, <= 4.34.8M; >= 4.33.0F, <= 4.33.10M; >= 4.32.0F, < 4.33.0F; >= 1.0.0, < 4.32.0F |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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