critical
9.9
CWE
22
Advisory Published
Updated

CVE-2021-40358: Path Traversal

First published: Tue Nov 09 2021(Updated: )

A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3 UC04), 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 V7.4 (All versions < V7.4 SP1 Update 19), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 5). Legitimate file operations on the web server of the affected systems do not properly neutralize special elements within the pathname. An attacker could then cause the pathname to resolve to a location outside of the restricted directory on the server and read, write or delete unexpected critical files.

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=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-update1
Siemens WinCC=16-update2
Siemens WinCC=16-update3
Siemens WinCC=16-update4
Siemens WinCC=17
Siemens WinCC=17-update1

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-2021-40358?

    The severity of CVE-2021-40358 is critical.

  • Which versions of SIMATIC PCS 7 are affected by CVE-2021-40358?

    SIMATIC PCS 7 V8.2, SIMATIC PCS 7 V9.0, and SIMATIC PCS 7 V9.1 are affected by CVE-2021-40358.

  • Which versions of SIMATIC WinCC are affected by CVE-2021-40358?

    SIMATIC WinCC V15 and earlier, SIMATIC WinCC V16, and SIMATIC WinCC V17 are affected by CVE-2021-40358.

  • How severe is the vulnerability in CVE-2021-40358?

    The severity of the vulnerability in CVE-2021-40358 is critical with a CVSS score of 9.9.

  • Where can I find more information about CVE-2021-40358?

    You can find more information about CVE-2021-40358 at the following link: [link](https://cert-portal.siemens.com/productcert/pdf/ssa-840188.pdf).

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