CVE-2025-2796— On affected platforms with hardware IPSec support running Arista EOS with IPsec enabled and anti-replay protection configured, EOS may exhibit unexpected behavior in specific cases. Received duplicate encrypted packets, which should be dropped under normal
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.
Arista EOS是美国Arista公司的一个完全可编程的、高度模块化的、基于Linux的网络操作系统。 Arista EOS存在安全漏洞，该漏洞源于在特定情况下可能错误转发应丢弃的重复加密数据包。
Possible ATT&CK Techniques 1 AI
T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2025-2796
Vulnerability Information
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Vulnerability Title
On affected platforms with hardware IPSec support running Arista EOS with IPsec enabled and anti-replay protection configured, EOS may exhibit unexpected behavior in specific cases. Received duplicate encrypted packets, which should be dropped under normal
Source: CVE Program / CVE List V5
Vulnerability Description
On affected platforms with hardware IPSec support running Arista EOS with IPsec enabled and anti-replay protection configured, EOS may exhibit unexpected behavior in specific cases. Received duplicate encrypted packets, which should be dropped under normal anti-replay protection, will instead be forwarded due to this vulnerability.
Note: this issue does not affect VXLANSec or MACSec encryption functionality.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Arista EOS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Arista EOS是美国Arista公司的一个完全可编程的、高度模块化的、基于Linux的网络操作系统。 Arista EOS存在安全漏洞，该漏洞源于在特定情况下可能错误转发应丢弃的重复加密数据包。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Arista Networks | EOS | 4.33.0 ~ 4.33.2F | - |
|
II. Public POCs for CVE-2025-2796
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Arista Networks · 2025-05-27 · 3 CVEs total
| CVE-2024-11185 | 6.5 MEDIUM | On affected platforms running Arista EOS, ingress traffic on Layer 2 ports may, under cert |
| CVE-2025-2826 | 2.6 LOW | n affected platforms running Arista EOS, ACL policies may not be enforced. IPv4 ingress AC |
IV. Related Vulnerabilities
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Under certain circumstances, an unauthenticated gNPSI client -
CVE-2026-73442
On affected platforms running Arista EOS with VRRP enabled, -
CVE-2026-73443
On affected platforms running Arista EOS with VRRPv2 IP-AH a
V. Comments for CVE-2025-2796
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