CVE-2026-66155Network attack vector

Script execution via unsanitized map pin tooltips

Published Aug 27, 2026 · Updated Aug 27, 2026

XSS in Siemens Element maps-ng V47 before 47.12.3, V48 before 48.11.3, and V49 before 49.16.1 allows remote authenticated users to run scripts. The si-map component renders user-controlled values from the points property as map-pin tooltip labels without properly neutralizing them. Exploitation requires a crafted URL to be loaded by a victim and the affected map pin to be hovered over, executing code in that browser session.

CVSS severity7.6
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XSS in Siemens Element maps-ng V47 before 47.12.3, V48 before 48.11.3, and V49 before 49.16.1 allows remote authenticated users to run scripts. The si-map component renders user-controlled values from the points property as map-pin tooltip labels without properly neutralizing them. Exploitation requires a crafted URL to be loaded by a victim and the affected map pin to be hovered over, executing code in that browser session.

The record

CVE
CVE-2026-66155
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Siemens
Product
Element maps-ng
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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 <V47.12.3
  2. Affected versionversion=0 <V48.11.3
  3. Affected versionversion=0 <V49.16.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Siemens · Element maps-ngversion=0 <V47.12.3; version=0 <V48.11.3; version=0 <V49.16.1

Published CVSS scores

7.6Siemens ProductCERTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
7.0CISA-ADPCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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')
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

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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