CVE-2026-73458

highpriority · track · 0EPSS 0.004 · 34 %ileDE
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.40% (34th) EPSS
CVSS 8.2 · high
Is it mine?
8 products
Check your exposure
Who says so?
1 sources
cert_bund

EPSS · scored 2026-10-28

On affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various routing protocols monitor status on BFD session(s).

01

cvss

Technical severity, 0–10. One row per scoring source.

9.2
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.8–9.2

v3.18.2highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:Hsecondary · psirt@arista.comexploitability 3.9 · impact 4.2
v4.09.2criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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:Xsecondary · psirt@arista.com
v4.07.8highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:H/E:U/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:Xsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-303US
04

affected products (8)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-3410Arista EOS: Mehrere SchwachstellenDeutsch2026-09-15csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Arista EOS ausnutzen, um sensible Schlüssel, Passwörter oder TACACS+-Secrets offenzulegen, Sicherheits- und Zugriffskontrollen zu beeinträchtigen, Netzwerk- oder Authentifizierungsdienste zu stören, Benutzerkonten mit erhöhten Berechtigungen auszustatten und im schwerwiegendsten Fall beliebigen Code mit Root-Rechten auf dem betroffenen Switch auszuführen.

06

sources

Which sources assert this record, and when.

cert_bundNVDCVE.orgMITRE
published 2026-09-15modified 2026-09-16
07

references (1) nvd

External citations — patches, advisories, analysis.

scry

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