CVE-2026-73443— Arista EOS VRRPv2 重放攻击漏洞
一分钟漏洞结论
影响对象
Arista Networks EOS
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indefinit
影响版本矩阵 4
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Arista Networks | EOS | 4.36.0≤ 4.36.1F |
affected |
4.35.0≤ 4.35.5M |
affected | ||
4.34.0≤ 4.34.7M |
affected | ||
4.33.0≤ 4.33.9M |
affected |
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一、 漏洞 CVE-2026-73443 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indef
来源: CVE Program / CVE List V5
Vulnerability Description
On affected platforms running Arista EOS with VRRPv2 IP-AH authentication configured, an unauthenticated attacker within the same layer 2 network segment on which VRRP is running can capture a legitimate authenticated VRRP advertisement and replay it indefinitely. Replayed advertisements can be used to advertise stale VRRP state, for example to prevent a backup router from taking over the virtual gateway after the original master has gone down, resulting in a denial of service for hosts using the virtual gateway address.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Arista Networks | EOS | 4.36.0 ~ 4.36.1F | - |
|
二、漏洞 CVE-2026-73443 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-73443 厂商安全公告 (1)
同批安全公告 · Arista Networks · 2026-09-16 · 共 28 条
| CVE-2026-73456 | 10.0 CRITICAL | Arista EOS gNPSI启用时未认证远程代码执行漏洞 |
| CVE-2026-73453 | 10.0 CRITICAL | Security Advisory 0174 安全公告 |
| CVE-2026-86106 | 9.6 CRITICAL | 无法确定：标题缺失具体软件及漏洞类型 |
| CVE-2026-73447 | 9.1 CRITICAL | gNSI Certz/Bootz OS命令注入漏洞 |
| CVE-2026-73464 | 8.8 HIGH | 安全公告 |
| CVE-2026-73435 | 8.2 HIGH | 安全通告0171 |
| CVE-2026-73454 | 8.1 HIGH | 0165安全公告 |
| CVE-2026-86108 | 8.0 HIGH | Security Advisory 0181 |
| CVE-2026-73461 | 8.0 HIGH | 安全公告 0163 |
| CVE-2026-73455 | 7.5 HIGH | Security Advisory 0173 安全公告 |
| CVE-2026-73439 | 7.5 HIGH | 无法确定，仅提供公告编号 |
| CVE-2026-2380 | 7.4 HIGH | 安全通告 0168 |
| CVE-2026-73450 | 6.9 MEDIUM | 无法翻译，缺少漏洞描述 |
| CVE-2026-86109 | 6.6 MEDIUM | 安全公告0182 |
| CVE-2026-73462 | 6.5 MEDIUM | Arista EOS IGMP Snooping 拒绝服务漏洞 |
| CVE-2026-77190 | 6.5 MEDIUM | 安全公告 0177 |
| CVE-2026-73468 | 6.5 MEDIUM | Security Advisory 0175 漏洞 |
| CVE-2026-73436 | 6.5 MEDIUM | Security Advisory 0171 |
| CVE-2026-86107 | 5.9 MEDIUM | 安全通告0180 |
| CVE-2026-73469 | 5.8 MEDIUM | 安全公告0176 |
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IV. Related Vulnerabilities
V. Comments for CVE-2026-73443
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