CVE-2026-19640

published 2026-09-16

CVE-2026-19640: On affected platforms running Arista EOS, an authenticated user with access to the gNMI (gRPC Network Management Interface) may receive incorrect authorization…

Priority P4 23 medium 4.2 CVSS 3.1

AV N AC H PR L UI N S U C L I L A N

On affected platforms running Arista EOS, an authenticated user with access to the gNMI (gRPC Network Management Interface) may receive incorrect authorization results, potentially allowing access beyond their currently assigned permissions.

This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
arista_networks	eos	>= 4.24.0F < 4.33.0F	4.33.0F
arista_networks	eos	4.33.0F – 4.33.8M	—
arista_networks	eos	4.34.0F – 4.34.7M	—
arista_networks	eos	4.35.0F – 4.35.5M	—
arista_networks	eos	4.36.0F – 4.36.0.1F	—

CVSS provenance

nvd v3.1 4.2 MEDIUM CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

nvd v4.0 2.3 LOW CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/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

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-863