CVE-2026-121286
Last modified
CVE-2026-121286 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. On affected platforms running Arista EOS in multi-agent routing model with BGP Segment Routing Traffic Engineering (SR-TE) address family configured, a BGP peer can send crafted BGP packets to cause the BGP process to restart, disrupting all BGP sessions on the device.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
Description
On affected platforms running Arista EOS in multi-agent routing model with BGP Segment Routing Traffic Engineering (SR-TE) address family configured, a BGP peer can send crafted BGP packets to cause the BGP process to restart, disrupting all BGP sessions on the device.
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; >= 4.22.1F, < 4.32.0F |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-121286?
How severe is CVE-2026-121286?
How do I fix CVE-2026-121286?
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.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-121262A vulnerability was found in phpMyAdmin SQL-Parser 6.0.0/6.0…5.3
- CVE-2026-121263A vulnerability was determined in phpMyAdmin MoTranslator up…6.3
- CVE-2026-121265SQL::Abstract versions before 2.000003 for Perl allow SQL in…9.8
- CVE-2026-121267Incorrect default permissions vulnerability in TÜBİTAK BİLGE…7.8
- CVE-2026-12127The WPForms – Easy Form Builder for WordPress – Contact Form…5.3
- CVE-2026-12128The Pinpoint Booking System – Version 2 plugin for WordPress…5.3
- CVE-2026-121287An unauthenticated attacker on an adjacent network segment c…8.8
- CVE-2026-121288An unauthenticated attacker on an adjacent network segment c…8.1
- CVE-2026-121289On affected platforms running Arista EOS with BGP configured…9.8
- CVE-2026-12129A vulnerability was identified in CodeAstro Human Resource M…3.5
- CVE-2026-121290On affected platforms running Arista EOS with Border Gateway…8.2
- CVE-2026-121291A crafted Error Report can leave EOS stuck believing that a …8.2
Are you affected by CVE-2026-121286?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST