CVE-2024-6920Network attack vector

Stored script execution via undisclosed input handling

Published Sep 2, 2024 · Updated Jun 3, 2026

Stored XSS in NACPremium through 01082024 allows remote authenticated users to execute scripts in another user's browser via stored content. The public CNA and national CERT records do not identify the affected input, storage location, or code path that fails to neutralize the content. Exploitation requires low-privileged network access and active interaction by another user, exposing browser-context data and actions to the injected script.

CVSS severity4.8
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in NACPremium through 01082024 allows remote authenticated users to execute scripts in another user's browser via stored content. The public CNA and national CERT records do not identify the affected input, storage location, or code path that fails to neutralize the content. Exploitation requires low-privileged network access and active interaction by another user, exposing browser-context data and actions to the injected script.

The record

CVE
CVE-2024-6920
Published
Sep 2, 2024
Updated
Jun 3, 2026
Vendor
NAC Telecommunication Systems Inc.
Product
NACPremium
Classifications
CWE-79, CAPEC-592
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=01082024

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NAC Telecommunication Systems Inc. · NACPremiumversion=0 <=01082024

Published CVSS scores

4.8Computer Emergency Response Team of the Republic of TurkeyCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/AU:N/R:U
6.1National Institute of Standards and TechnologyCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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