What’s Vulnerable › Vulnerabilities

CVE-2022-25622

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-04-12 · updated 2026-06-17
• Weakness: CWE-400

Description

The PROFINET (PNIO) stack, when integrated with the Interniche IP stack, improperly handles internal resources for TCP segments where the minimum TCP-Header length is less than defined. This could allow an attacker to create a denial of service condition for TCP services on affected devices by sending specially crafted TCP segments.

Affected products

• Siemens Simatic Cfu Diq Firmware: all versions
• Siemens Simatic Cfu Pa Firmware: all versions
• Siemens Simatic S7-1500 Cpu Firmware: before 2.0.0 — fixed in 2.0.0
• Siemens Simatic S7-300 Cpu Firmware: all versions
• Siemens Simatic S7-400 Pn/Dp V7 Firmware: all versions
• Siemens Simatic S7-400H V6 Firmware: all versions
• Siemens Simatic S7-410 V10 Firmware: all versions
• Siemens Simatic S7-410 V8 Firmware: all versions
• Siemens AG SIMATIC TDC CP51M1: all versions
• Siemens Simatic Tdc Cpu555 Firmware: all versions
• Siemens Simatic Winac Rtx Firmware: all versions
• Siemens SIMIT Simulation Platform: all versions

How to fix

Upgrade to a fixed version: Siemens Simatic S7-1500 Cpu Firmware 2.0.0. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/html/ssa-446448.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-446448.pdf
• https://cert-portal.siemens.com/productcert/html/ssa-446448.html
• https://cert-portal.siemens.com/productcert/pdf/ssa-446448.pdf

Get alerted when CVE-2022-25622 or the next vulnerability affects your stack