Search/CVE-2026-73458
● CVE — High

CVE-2026-73458

DiscoveredSep 15, 2026UpdatedSep 16, 2026

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).

CVSS v3.1
8.2 HIGH
EPSS
0.40%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Sep 17, 2026 → Sep 25, 2026
▲ 0.02pp
0.38% → 0.40% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityLOW
AvailabilityHIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Connections
1 relationships
Timeline
disclosure → media coverage
Sep 15, 2026
Disclosure — published as a CVE record.