CVE-2026-73454 Arista EOS - Broken Access Control

Arista EOS with gRPC Network Security Interface (gNSI) Credentialz contains a broken access control vulnerability caused by specially crafted requests modifying account properties, letting attackers escalate privileges, exploit requires gNSI Credentialz configured.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.39% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation, Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-77

Vendor fix

Update to the latest version with gNSI Credentialz security fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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