Medium 5.9Published May 19, 2026

CVE-2025-40901HTML injection in Credentials Manager in Guardian/CMC before 26.1.0

Updated under an hour ago (Oct 25, 2026, 11:10 PM ET)

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It affects Nozomi Networks Guardian and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Nozomi Networks Guardian

Exploited in the last 30 days

A Stored HTML Injection vulnerability was discovered in the Credentials Manager functionality due to improper validation of an input parameter. An authenticated user with administrative privileges can define a malicious identity containing HTML tags. When a victim attempts to delete the affected identity, the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Nozomi
NVD analysis: Modified
Record last updated: Aug 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Nozomi Networks Guardian nozomi_networks:guardian (from the name)	before 26.1.0	CNA record
Nozomi Networks CMC nozomi_networks:cmc (from the name)	before 26.1.0	CNA record
Siemens RUGGEDCOM APE1808 siemens:ruggedcom_ape1808 (from the name)	all versions	CISA ADP
nozominetworks cmc nozominetworks:cmc	before 26.1.0	NVD
nozominetworks guardian nozominetworks:guardian	before 26.1.0	NVD

References

https://security.nozominetworks.com/NN-2026:4-01vendor-advisory
https://cert-portal.siemens.com/productcert/html/ssa-827968.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.