high
7.8
CWE
538 312
Advisory Published
Updated

CVE-2021-40363

First published: Wed Feb 09 2022(Updated: )

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC PCS 7 V9.1 (All versions < V9.1 SP1), SIMATIC WinCC V15 and earlier (All versions < V15 SP1 Update 7), SIMATIC WinCC V16 (All versions < V16 Update 5), SIMATIC WinCC V17 (All versions < V17 Update 2), SIMATIC WinCC V17 (All versions <= V17 Update 4), SIMATIC WinCC V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 6). The affected component stores the credentials of a local system account in a potentially publicly accessible project file using an outdated cipher algorithm. An attacker may use this to brute force the credentials and take over the system.

Credit: productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Siemens Simatic PCS 7 Telecontrol Firmware<=8.2
Siemens Simatic PCS 7 Telecontrol Firmware=9.0
Siemens Simatic PCS 7 Telecontrol Firmware=9.1
Siemens WinCC<7.4
Siemens WinCC=7.4
Siemens WinCC=7.4-sp1
Siemens WinCC=7.4-sp1_update1
Siemens WinCC=7.4-sp1_update10
Siemens WinCC=7.4-sp1_update11
Siemens WinCC=7.4-sp1_update12
Siemens WinCC=7.4-sp1_update13
Siemens WinCC=7.4-sp1_update14
Siemens WinCC=7.4-sp1_update15
Siemens WinCC=7.4-sp1_update16
Siemens WinCC=7.4-sp1_update17
Siemens WinCC=7.4-sp1_update18
Siemens WinCC=7.4-sp1_update2
Siemens WinCC=7.4-sp1_update3
Siemens WinCC=7.4-sp1_update4
Siemens WinCC=7.4-sp1_update5
Siemens WinCC=7.4-sp1_update6
Siemens WinCC=7.4-sp1_update7
Siemens WinCC=7.4-sp1_update8
Siemens WinCC=7.4-sp1_update9
Siemens WinCC=7.4-update_1
Siemens WinCC=7.5
Siemens WinCC=7.5-sp1
Siemens WinCC=7.5-sp1_update1
Siemens WinCC=7.5-sp1_update2
Siemens WinCC=7.5-sp2
Siemens WinCC=7.5-sp2_update1
Siemens WinCC=7.5-sp2_update2
Siemens WinCC=7.5-sp2_update3
Siemens WinCC=7.5-sp2_update4
Siemens WinCC=7.5-sp2_update5
Siemens WinCC=13
Siemens WinCC=13-sp1
Siemens WinCC=13-sp2
Siemens WinCC=14.0.1
Siemens WinCC=15
Siemens WinCC=15.1
Siemens WinCC=15.1-update_1
Siemens WinCC=15.1-update_2
Siemens WinCC=15.1-update_3
Siemens WinCC=15.1-update_4
Siemens WinCC=15.1-update_5
Siemens WinCC=15.1-update_6
Siemens WinCC=16
Siemens WinCC=16-update1
Siemens WinCC=16-update2
Siemens WinCC=16-update3
Siemens WinCC=16-update4
Siemens WinCC=17
Siemens WinCC=17-update1

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-914168.pdf

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-40363?

    CVE-2021-40363 has been classified with a medium severity rating.

  • How do I fix CVE-2021-40363?

    To mitigate CVE-2021-40363, update your Siemens SIMATIC PCS 7 or WinCC software to the recommended versions as specified by Siemens.

  • What software is affected by CVE-2021-40363?

    CVE-2021-40363 affects multiple versions of Siemens SIMATIC PCS 7, SIMATIC WinCC, including V8.2 and V9.1 for PCS 7 and various versions of WinCC.

  • What could happen if I don't address CVE-2021-40363?

    Failing to address CVE-2021-40363 could expose your system to potential unauthorized access or manipulation.

  • Is there a workaround for CVE-2021-40363?

    A workaround for CVE-2021-40363 may include restricting access to affected systems, though updating to the latest software is always recommended.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203