CVE-2026-73461
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Summary
On affected EOS platforms with AAA-based gRPC authorization enabled for OpenConfig, gRPC requests of an authenticated user to OpenConfig may use the wrong privilege level, resulting in an authorization using the wrong AAA method list. This does not impact non-gRPC OpenConfig requests such as NETCONF.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Arista Networks | EOS | 4.29.0F < 4.30.0F | affected |
| Arista Networks | EOS | 4.30.0F < 4.31.0F | affected |
| Arista Networks | EOS | 4.31.0F < 4.32.0F | affected |
| Arista Networks | EOS | 4.32.0F <= 4.32.11M | affected |
| Arista Networks | EOS | 4.33.0F <= 4.33.8M | affected |
| Arista Networks | EOS | 4.34.0F <= 4.34.7M | affected |
| Arista Networks | EOS | 4.35.0F <= 4.35.5M | affected |
| Arista Networks | EOS | 4.36.0F <= 4.36.0.1F | affected |
Weaknesses
- CWE-266: CWE-266 Incorrect Privilege Assignment
Workarounds
Ensure that the privilege level 0 AAA authorization method list includes methods beyond 'none' to prevent unintended access escalation:
aaa authorization exec default local group tacacs+ aaa authorization commands 0 default local group tacacs+
To detect potential exploitation, enable AAA accounting and monitor logs for cases where a user's privilege level in gRPC requests does not match their defined privilege level (e.g., a user with privilege 9 appearing as priv-lvl=0 in gRPC requests).
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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