ICSA-24-284-01: Siemens SIMATIC S7-1500 and S7-1200 CPUs

CISA's summary

Summary: Several SIMATIC S7-1500 and S7-1200 CPU versions are affected by an open redirect vulnerability that could allow an attacker to make the web server of affected devices redirect a legitimate user to an attacker-chosen URL. For a successful attack, the legitimate user must actively click on an attacker-crafted link. Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.

Products, as the advisory lists them

DeSpy has not checked any unit, hardware revision or firmware.

Vulnerabilities in this advisory

• CVE-2024-46886 — CVE-2024-46886 · CWE-601

  The web server of affected devices does not properly validate input that is used for a user redirection. This could allow an attacker to make the server redirect the legitimate user to an attacker-chosen URL. For a successful exploit, the legitimate user must actively click on an attacker-crafted link.

Acknowledgments, as the advisory lists them

• David Henrique Estevam de Andrade: reporting this vulnerability to Siemens.

The advisory's legal notice

The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.

Sources

• The advisory at cisa.gov
• The CSAF document (JSON)

DeSpy's copy of this version is dated 2026-09-28.