CVE-2026-7891

criticalpriority · track · 36EPSS 0.003 · 20 %ileDEEUNLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (20th) EPSS

CVSS 9.1 · critical

Is it mine?

167 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · cisa_csaf_ot · ncsc_nl

EPSS · scored 2026-09-21

A vulnerability has been identified in Mendix Runtime (All versions). Mendix documentation for access rules does not adequately describe the special behavior of the System.User entity, leaving developers without sufficient guidance to configure access rules securely. This documentation gap may lead application developers to unknowingly apply overly permissive access rules to System.User, resulting in unintended exposure of sensitive user data or privilege escalation within deployed Mendix applications.

cvss

Technical severity, 0–10. One row per scoring source.

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · productcert@siemens.com DEexploitability 3.9 · impact 5.2

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · CISA US

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · NCSC-NL NL

v4.09.1criticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:Nsecondary · ENISA EU

v4.09.1criticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · productcert@siemens.com DE

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-277USprimaryCWE-277USCWE-277USCWE-277US

affected products (167)

Products and version ranges known to be affected.

Mendix Runtimeall versionsnot affectedcisa_csaf_otUS
Siemens Mendix Runtime≤ vers:all/*not affectedcisa_csaf_otUS
Siemens Mendix Runtime0 → *enisa_euvdEU
Siemens CADRA≤ vers:unknown/*ncsc_nlNL
Siemens COMOS V10.4.5≤ vers:unknown/*ncsc_nlNL
Siemens COMOS V10.6≤ vers:unknown/*ncsc_nlNL
Siemens Cpu 1518F-4 Pn/Dp Mfp Firmware≤ vers:unknown/*ncsc_nlNL
Siemens Designcenter NX≤ vers:unknown/*ncsc_nlNL
Siemens Mendix Runtime≤ vers:unknown/*ncsc_nlNL
Siemens Opcenter X≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM APE1808≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2)≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2)≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX MX5000≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX MX5000 FIRMWARE≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX MX5000RE≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX RX1400≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX RX1400 FIRMWARE≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX RX1500≤ vers:unknown/*ncsc_nlNL
Siemens RUGGEDCOM ROX RX1500 FIRMWARE≤ vers:unknown/*ncsc_nlNL

showing 20 of 167

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0229Kwetsbaarheden verholpen in Siemens productenNL2026-07-14csaf · ncsc_nlNL
Siemens heeft kwetsbaarheden verholpen in diverse producten als CADRA, IAM, Mendix, OpCenter, RUGGEDCOM, SIDIS en SIMATIC.
SSA-814963SSA-814963: Insecure Inherited Permission in Mendix (Revoked)2026-07-14csaf · siemens_psirtDE
This advisory is revoked. Re-investigation confirmed the reported behavior is expected platform configuration and does not expose the protected attribute.
ICSA-26-209-02Siemens Mendix Runtime2026-07-14icsa · cisa_csaf_otUS
This advisory is revoked. Re-investigation confirmed the reported behavior is expected platform configuration and does not expose the protected attribute.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot ncsc_nl siemens_psirt NVD CVE.org MITRE

published 2026-05-07modified 2026-07-14

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+100 more

references (7)

External citations — patches, advisories, analysis.

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