TI-2026-51568 Aliases CVE-2026-73453 GHSA-383x-9pf8-56g8

Code injection in Arista EOS

MEDIUM 50CWE-94Published 2026-09-16 · Updated 2026-09-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

An unauthenticated P4Runtime (Programming Protocol-Independent Packet Processors Runtime) client can achieve arbitrary code execution under certain conditions on affected platforms running Arista EOS configured with P4Runtime. P4Runtime is disabled by default in Arista EOS. By crafting a malicious packet during the initiation of a P4Runtime session, an attacker can obtain complete administrative control over the compromised switch. This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00695 53rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Arista	EOS	4.36.0F – 4.36.1F; 4.35.0F – 4.35.5M; 4.34.0F – 4.34.7M; 4.33.0F to before 4.34.0F; 4.32.0F to before 4.33.0F; 4.31.0F to before 4.32.0F; 4.30.0F to before 4.31.0F; 4.29.2F to before 4.30.0F	—	No fix listed	CNA

EOS VendorArista Affected 4.36.0F – 4.36.1F; 4.35.0F – 4.35.5M; 4.34.0F – 4.34.7M; 4.33.0F to before 4.34.0F; 4.32.0F to before 4.33.0F; 4.31.0F to before 4.32.0F; 4.30.0F to before 4.31.0F; 4.29.2F to before 4.30.0F Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-73453
2026-10-03 Alias added: GHSA-383x-9pf8-56g8

References

Advisory 1

Security Advisory 0174

TI-2026-79524 Privilege escalation in Arista VeloCloud Orchestrator on-premises KEVCVSS 4.0CRITICAL 9.4
TI-2026-63212 Improper input validation in Arista VeloCloud Orchestrator On-Prem KEVCVSS 4.0CRITICAL 9.5
TI-2026-13992 VeloCloud Orchestrator OS Command Injection KEVCVSS 4.0CRITICAL 10.0
TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8

See all 216 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences