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No exploitation reportedAwaiting NVD analysis

CVE-2026-121295

Security Advisory 0223

No exploitation reported by the sources we read.

  • Published2026-11-10
  • WeaknessCWE-1284

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.

Timeline

dates in UTC
  1. 2026-11-1020:09CVE publishedCNA

Versions per branch

Products declared by the CNA

As Arista, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Arista Networks EOSother versions: not affected

    platforms: 710 Series, 720D Series, 720XP/722XPM Series, 750X Series, 7010TX Series, 7020R/R4 Series, 7280R/R2/R3/R4 Series, 7500R/R2/R3 Series, 7800R3/R4 Series, 7700R4 Series, CloudEOS, cEOS-lab, vEOS-lab, CloudVision eXchange, virtual or physical appliance

    Affected
    • ≥ 4.36.0F, ≤ 4.36.2Fno fix statedcustom
    • ≥ 4.35.0F, ≤ 4.35.6Mno fix statedcustom
    • ≥ 4.34.0F, ≤ 4.34.8Mno fix statedcustom
    • ≥ 4.33.0F, ≤ 4.33.10Mno fix statedcustom
    • ≥ 4.32.0F, < 4.33.0Ffixed in 4.33.0Fcustom
    • ≥ 1.0.0, < 4.32.0Ffixed in 4.32.0Fcustom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-10

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-121295 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-10
  • CNACVSS 4.09.22026-11-10
  • CNACVSS 3.18.62026-11-10
  • CNAweakness (CWE)CWE-12842026-11-10

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
2026-11-10
Last Modified
2026-11-10
NVD status
Received

Frequently asked questions

What is CVE-2026-121295?

On affected platforms running Arista EOS configured as S-BFD peers, an unauthenticated attacker could send a crafted S-BFD PDU to an initiator device. This crafted PDU could cause the kernel on the initiator device to crash, resulting in an unexpected device reboot.

Is CVE-2026-121295 actively exploited?

Active exploitation of CVE-2026-121295 has not been confirmed.

What is the CVSS score for CVE-2026-121295?

CVE-2026-121295 has a CVSS v3 base score of 8.6 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

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