Dashboard / CVE-2026-121291

CVE-2026-121291

HIGH
MEDIUM Priority: 0.03 BB Relevance: 77/100
Published: 2026-11-10 Modified: 2026-11-13 First seen: 2026-11-10 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: Present
VC: None
VI: High
VA: Low

Description

A crafted Error Report can leave EOS stuck believing that a cache reset is in progress, preventing ROA publication, withdrawal reconciliation, and BGP origin-validation updates.

Weakness Classification (1)

Affected Software (6)

VendorProductVersion
Arista Networks EOS 4.37.0F
Arista Networks EOS 4.36.0F
Arista Networks EOS 4.35.0F
Arista Networks EOS 4.37.0F
Arista Networks EOS 4.36.0F
Arista Networks EOS 4.35.0F

References & Advisories (1)

Change History

FieldOld ValueNew ValueDetected
cvss_base 8.2 8.3 2026-11-13T18:30
cvss_base 8.3 8.2 2026-11-13T18:00

Bug Bounty Relevance

77 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:L/SA:N/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

EPSS — Exploitation Probability

0.41%
Raw Score 0.004130
Percentile 36.2%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00413
2026-11-13
0.00413
2026-11-12
0.00413

Intelligence Sources

mitre ref →
nvd ref →

External Links