CVE WatchSep 16, 2026

CVE-2026-73463

On affected platforms running Arista EOS, when multiple gRPC Network Security Interface (gNSI) transports are configured, a race condition i

CVSS

5.3

Medium

EPSS

—

KEV

—

Exploit Today

—

0-100

Published: Sep 16, 2026 · Last modified: Sep 16, 2026 · CWE-362

EPSS · 30d

Not enough EPSS history yet.

Technical description

On affected platforms running Arista EOS, when multiple gRPC Network Security Interface (gNSI) transports are configured, a race condition in the gNSI Authz service may cause a policy rotation to fail silently. An authenticated user whose access was revoked by the new policy may retain unauthorized access to gRPC interfaces. This does not affect Bootz. This issue was discovered internally by Arista, and the company is not aware of any malicious exploitation of this vulnerability in customer networks.

Official references

www.arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisory/24725-security-advisory-0169

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-91723—

—

———Race condition in WebAppInstalls in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium)23h CVE-2026-587347.0 HIG

—

———In google_mba_recv_msg of google_mba_poll.c, there is a possible out-of-bounds write due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.16h CVE-2026-587287.0 HIG

—

———In ARM64_TLBI of mmu.h, there is a possible memory corruption due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.16h CVE-2026-587247.0 HIG

—

———In multiple locations, there is a possible use-after-free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.16h CVE-2026-587166.7 MED

—

———In multiple locations, there is a possible time-of-check to time-of-use due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.16h CVE-2026-587017.0 HIG

—

———In trusty_dputc of generic-arm64-smcall.c, there is a possible out-of-bounds write due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.16h