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CVE-2026-31981

MEDIUM
5.9
CVSS 3.1
Description
A Stored HTML Injection vulnerability was discovered in the Diagram tab and Graph view due to a shared input validation function being insufficiently restrictive. An authenticated user with administrative privileges can inject malicious HTML tags into N2OS configuration data through multiple input vectors. When a victim views the affected data in the Diagram tab and Graph view, 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.

Metadata

CVE ID
CVE-2026-31981
State
PUBLISHED
Assigner
Nozomi
Reserved
2026-03-10 16:14 UTC
Published
2026-07-09 07:22 UTC
Last updated
2026-07-09 12:43 UTC
Primary CWE
CWE-79
CWE-79 Improper neutralization of input during web page gene…
Vendor / Product
Nozomi Networks / Guardian
Sources
cve.org  ·  NVD

Severity & Metrics

5.9 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (2)
VendorProductPlatformVersions
Nozomi Networks CMC — 0 < 26.2.0
Nozomi Networks Guardian — 0 < 26.2.0
Weakness (CWE)
CWESourceDescription
CWE-79 cna CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
5.9 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L
4.8 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
References (1)
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