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CVE-2026-33920— Cross-site request forgery in the Guardian/CMC login before 26.3.0

Quick assessment

Affected
Nozomi Networks Guardian
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.

在登录功能（包括标准登录和SAML登录）中发现了跨站请求伪造（CSRF）漏洞，原因是缺少对防CSRF令牌（anti-CSRF token）的校验。拥有有效账户的攻击者可以诱使受害者不知晓的情况下，使用攻击者的身份凭证进行认证。在这种状态下，受害者执行的任何操作都会被归因于攻击者的账户，从而破坏了审计追踪记录的完整性。

CVSS 3.5 · Low

Possible ATT&CK Techniques 1 AI

T1598.002 · Spearphishing Attachment

Affected Version Matrix 2

VendorProduct Version RangeStatus
Nozomi Networks CMC < 26.3.0 affected
Nozomi Networks Guardian < 26.3.0 affected
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I. Basic Information for CVE-2026-33920

Vulnerability Information
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Vulnerability Title
Cross-site request forgery in the Guardian/CMC login before 26.3.0
Source: CVE Program / CVE List V5
Vulnerability Description
A cross-site request forgery vulnerability was discovered in the login functionality (both standard and SAML) due to missing validation of the anti-CSRF token. An attacker with a valid account can trick a victim into unknowingly authenticating with the attacker's credentials. Any operation performed by the victim in this state is attributed to the attacker's account, compromising the integrity of the audit trail.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Nozomi Networks Guardian 0 ~ 26.3.0 -
Nozomi Networks CMC 0 ~ 26.3.0 -

II. Public POCs for CVE-2026-33920

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III. Intelligence Information for CVE-2026-33920

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Vendor Pages for CVE-2026-33920 (1)

Same Patch Batch · Nozomi Networks · 2026-09-08 · 5 CVEs total

CVE-2026-33389 7.5 HIGH Disabled and non-configurable certificate/host key validation in Smart Polling in Guardian
CVE-2026-33388 7.4 HIGH Incorrect authorization in Credentials Manager in Guardian/CMC before 26.3.0
CVE-2026-33391 5.4 MEDIUM Incorrect authorization in Smart Polling configuration in Guardian/CMC before 26.3.0
CVE-2026-33387 4.6 MEDIUM Insufficient sanitization of Dashboards in Guardian/CMC before 26.3.0

IV. Related Vulnerabilities

Same product: Guardian
Same vendor: Nozomi Networks
Same weakness: CWE-352

V. Comments for CVE-2026-33920

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