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CVE-2025-40896— Lack of TLS certificate validation when connecting Arc to a Guardian or CMC, in Arc before v2.2.0

Quick assessment

Affected
Nozomi Networks Arc
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.

Nozomi Networks Arc是美国Nozomi Networks公司的一款端点检测与响应代理软件。 Nozomi Networks Arc存在信任管理问题漏洞，该漏洞源于Arc agent连接时未验证服务器证书，可能导致中间人攻击、窃取客户端令牌和敏感信息或注入欺骗数据。

CVSS 6.5 · Medium EPSS 0.11% · P2
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I. Basic Information for CVE-2025-40896

Vulnerability Information
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Vulnerability Title
Lack of TLS certificate validation when connecting Arc to a Guardian or CMC, in Arc before v2.2.0
Source: CVE Program / CVE List V5
Vulnerability Description
The server certificate was not verified when an Arc agent connected to a Guardian or CMC. A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Arc agent and the Guardian or CMC. This could result in theft of the client token and sensitive information (such as assets and alerts), impersonation of the server, or injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Nozomi Networks Arc 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nozomi Networks Arc是美国Nozomi Networks公司的一款端点检测与响应代理软件。 Nozomi Networks Arc存在信任管理问题漏洞，该漏洞源于Arc agent连接时未验证服务器证书，可能导致中间人攻击、窃取客户端令牌和敏感信息或注入欺骗数据。
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
Nozomi Networks Arc 0 ~ 2.2.0 -

II. Public POCs for CVE-2025-40896

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III. Intelligence Information for CVE-2025-40896

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Vendor Advisories for CVE-2025-40896 (1)

Same Patch Batch · Nozomi Networks · 2026-03-04 · 3 CVEs total

CVE-2025-40895 4.8 MEDIUM HTML injection in Sensor Map in CMC before 25.6.0
CVE-2025-40894 4.4 MEDIUM HTML injection in Alerted Nodes Dashboard in Guardian/CMC before 25.6.0

IV. Related Vulnerabilities

Same product: Arc
Same vendor: Nozomi Networks
Same weakness: CWE-295

V. Comments for CVE-2025-40896

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