CVE-2026-33920 PUBLISHED

Cross-site request forgery in the Guardian/CMC login before 26.3.0

Assigner: Nozomi
Reserved: 24.03.2026 Published: 08.09.2026 Updated: 08.09.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N
CVSS Score: 3.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Nozomi Networks
Product	Guardian
Versions	Default: unaffected affected from 0 to 26.3.0 (excl.)

Vendor	Nozomi Networks
Product	CMC
Versions	Default: unaffected affected from 0 to 26.3.0 (excl.)

Workarounds

Users should always pay attention to phishing emails and untrusted links.

Solutions

Upgrade to v26.3.0 or later.

Credits

This issue was found by one of our customers during a VAPT testing session. finder

References

https://security.nozominetworks.com/NN-2026:18-01

Problem Types

CWE-352 Cross-site request forgery (CSRF) CWE

Impacts

CAPEC-62 Cross Site Request Forgery