CVE-2026-73458

critical · 9.2

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).

9.2

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-15

Published

CVSS: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:X

Weaknesses

CWE-303

References

https://www.arista.com/en/support/advisories-notices/security-advisory/24710-security-advisory-0154

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-73458