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CVE-2026-73469— Security Advisory 0176

Quick assessment

Affected
Arista Networks EOS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

当特定平台在使用 Arista EOS 并配置了宽松的无icast 反向路径转发（uRPF）时，某些流量可能不会经历预期的验证丢弃机制。因此，根据这些路由本应被丢弃的流量仍可能被设备处理和转发。 该问题由 Arista 内部发现，公司目前未了解到客户网络中存在对此问题的恶意利用情况。

CVSS 5.8 · Medium EPSS 0.29% · P22

Possible ATT&CK Techniques 2 AI

T1090 · Proxy T1562

Affected Version Matrix 1

VendorProduct Version RangeStatus
Arista Networks EOS 4.35.0F≤ 4.35.4M affected
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I. Basic Information for CVE-2026-73469

Vulnerability Information
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Vulnerability Title
Security Advisory 0176
Source: CVE Program / CVE List V5
Vulnerability Description
When specific platforms are using Arista EOS with a loose Unicast Reverse Path Forwarding (uRPF) configuration, certain traffic may not be subjected to the intended verification drop. Consequently, traffic that should be dropped based on these routes could still be processed and forwarded by the device. This issue was discovered internally by Arista and the company is not aware of any malicious uses of this issue in customer networks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Arista Networks EOS 4.35.0F ~ 4.35.4M -

II. Public POCs for CVE-2026-73469

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III. Intelligence Information for CVE-2026-73469

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Other References for CVE-2026-73469 (1)

Same Patch Batch · Arista Networks · 2026-09-16 · 28 CVEs total

CVE-2026-73456 10.0 CRITICAL Under certain circumstances, an unauthenticated gNPSI client can craft a malicious request
CVE-2026-73453 10.0 CRITICAL Security Advisory 0174
CVE-2026-86106 9.6 CRITICAL Security Advisory 0179
CVE-2026-73447 9.1 CRITICAL Security Advisory 0162 - gNSI Certz/Bootz OS Command Injection via Crafted Rotate Request
CVE-2026-73464 8.8 HIGH Security Advisory 0166
CVE-2026-73435 8.2 HIGH Security Advisory 0171
CVE-2026-73454 8.1 HIGH Security Advisory 0165
CVE-2026-86108 8.0 HIGH Security Advisory 0181
CVE-2026-73461 8.0 HIGH Security Advisory 0163
CVE-2026-73455 7.5 HIGH Security Advisory 0173
CVE-2026-73439 7.5 HIGH Security Advisory 0164
CVE-2026-2380 7.4 HIGH Security Advisory 0168
CVE-2026-73450 6.9 MEDIUM Security Advisory 0161
CVE-2026-86109 6.6 MEDIUM Security Advisory 0182
CVE-2026-73462 6.5 MEDIUM On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) sn
CVE-2026-77190 6.5 MEDIUM Security Advisory 0177
CVE-2026-73468 6.5 MEDIUM Security Advisory 0175
CVE-2026-73436 6.5 MEDIUM Security Advisory 0171
CVE-2026-86107 5.9 MEDIUM Security Advisory 0180
CVE-2026-73438 5.3 MEDIUM Security Advisory 0172

Showing top 20 of 28 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: EOS
Same vendor: Arista Networks
Same weakness: CWE-863