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CVE-2026-120980 arista networks eos: Reachable Assertion

6.0 mediumEPSS 0.3%

Medium (6.0) in arista networks eos. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.

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On affected platforms running Arista EOS with VPLS-BGP enabled, an attacker who has established a BGP session with the PE routers can send a specially crafted BGP packet to cause the BGP agent to restart unexpectedly.

Severity

CVSS 4.0

6.0 medium
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

CVSS 3.1

5.3 medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
0.3% estimated probability of exploitation activity in the next 30 days; 17th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-617 Reachable Assertion
Published
Modified
Assigned by
Arista (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • arista networks:eos

Versions

From the CNA's record in the CVE List.

ProductAffected
Arista Networks EOSfrom 4.33.0F through 4.33.10M
Arista Networks EOSfrom 4.34.0F through 4.34.8M
Arista Networks EOSfrom 4.35.0F through 4.35.6M
Arista Networks EOSfrom 4.36.0F through 4.36.2F

References

Check your stackJSON