CVE-2026-26724Public exploitNetwork attack vector

Browser-session theft via unencoded stored group names

Published Feb 20, 2026 · Updated Feb 20, 2026

Stored cross-site scripting in Key Systems Inc Global Facilities Management Software 20230721a allows remote authenticated users to run JavaScript. The Groups endpoint stores the selectgroup and gn parameter values and later renders them across multiple HTML pages without output encoding or sanitization. Low-privilege access is required to edit a group name, and the payload executes in another user's browser when an affected page is viewed, exposing that user's session and data.

CVSS severity7.6
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Key Systems Inc Global Facilities Management Software 20230721a allows remote authenticated users to run JavaScript. The Groups endpoint stores the selectgroup and gn parameter values and later renders them across multiple HTML pages without output encoding or sanitization. Low-privilege access is required to edit a group name, and the payload executes in another user's browser when an affected page is viewed, exposing that user's session and data.

The record

CVE
CVE-2026-26724
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.1Chandler JohnsonCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
7.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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