CVE-2021-31891

Name: CVE-2021-31891
Creator: NVD / NIST
Published: 2021-09-14T11:15:24.023+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 3.84%

Last modified Jun 17, 2026

CVE-2021-31891 is a critical-severity vulnerability rated 10/10 on the CVSS scale. A vulnerability has been identified in Desigo CC (All versions with OIS Extension Module), GMA-Manager (All versions with OIS running on Debian 9 or earlier), Operation Scheduler (All versions with OIS running on Debian 9 or earlier), Siveillance Control (All versions with OIS running on Debian 9 or earlier), Siveillance Control Pro (All versions). The affected application incorrectly neutralizes special elements in a specific HTTP GET request which could lead to command injection. EPSS estimates a 3.84% chance of exploitation in the next 30 days.

Description

A vulnerability has been identified in Desigo CC (All versions with OIS Extension Module), GMA-Manager (All versions with OIS running on Debian 9 or earlier), Operation Scheduler (All versions with OIS running on Debian 9 or earlier), Siveillance Control (All versions with OIS running on Debian 9 or earlier), Siveillance Control Pro (All versions). The affected application incorrectly neutralizes special elements in a specific HTTP GET request which could lead to command injection. An unauthenticated remote attacker could exploit this vulnerability to execute arbitrary code on the system with root privileges.

Metrics

CVSS 3.1

10/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

3.84%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Siemens	Desigo Cc	All versions
Siemens	Siveillance Control Pro	All versions
Siemens	Gma-Manager	All versions
Siemens	Operation Scheduler	All versions
Siemens	Siveillance Control	All versions

References

https://cert-portal.siemens.com/productcert/pdf/ssa-535380.pdfPatch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-535380.pdfPatch, Vendor Advisory

Timeline

Published: Sep 14, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31891?

How severe is CVE-2021-31891?

CVE-2021-31891 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 3.84% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31891?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-31891?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST