What’s Vulnerable › Vulnerabilities

CVE-2019-10929

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-08-13 · updated 2026-06-17
• Weakness: CWE-327

Description

A vulnerability has been identified in SIMATIC CP 1626 (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V20.8), SIMATIC HMI Panel (incl. SIPLUS variants) (All versions), SIMATIC NET PC Software V14 (All versions < V14 SP1 Update 14), SIMATIC NET PC Software V15 (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.8.1), SIMATIC S7-1500 Software Controller (All versions < V20.8), SIMATIC S7-PLCSIM Advanced (All versions < V3.0), SIMATIC STEP 7 (TIA Portal) (All versions < V16), SIMATIC WinCC (TIA Portal) (All versions < V16), SIMATIC WinCC OA (All versions < V3.16 P013), SIMATIC WinCC Runtime Advanced (All versions < V16), SIMATIC WinCC Runtime Professional (All versions < V16), TIM 1531 IRC (incl. SIPLUS NET variants) (All versions < V2.1). Affected devices contain a message protection bypass vulnerability due to certain properties in the calculation used for integrity protection. This could allow an attacker in a Man-in-the-Middle position to modify network traffic sent on port 102/tcp to the affected devices.

Affected products

• Siemens Simatic Cp 1626 Firmware: all versions
• Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc2 Firmware: all versions
• Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc Firmware: all versions
• Siemens Simatic Hmi Panel Firmware: all versions
• Siemens Simatic Net Pc: before 16 — fixed in 16
• Siemens Simatic S7-1200 Cpu 1211C Firmware: through 4.0
• Siemens Simatic S7-1200 Cpu 1212C Firmware: through 4.0
• Siemens Simatic S7-1200 Cpu 1214C Firmware: through 4.0
• Siemens Simatic S7-1200 Cpu 1215C Firmware: through 4.0
• Siemens Simatic S7-1200 Cpu 1217C Firmware: through 4.0
• Siemens Simatic S7-1500: all versions
• Siemens Simatic S7-1500 Cpu 1511C Firmware: all versions
• Siemens Simatic S7-1500 Cpu 1512C Firmware: all versions
• Siemens Simatic S7-1500 Cpu 1518 Firmware: all versions
• Siemens SIMATIC S7-PLCSIM Advanced: all versions
• Siemens SIMATIC STEP 7 (TIA Portal): before 16 — fixed in 16
• Siemens Simatic Tim 1531 Irc Firmware: before 2.1 — fixed in 2.1
• Siemens Simatic Wincc: before 16 — fixed in 16
• Siemens AG SIMATIC WinCC OA V3.14 and prior: through 3.15; 3.16, 3.16-patch_12
• Siemens Simatic Wincc Runtime: all versions

How to fix

Upgrade to a fixed version: Siemens Simatic Net Pc 16; Siemens SIMATIC STEP 7 (TIA Portal) 16; Siemens Simatic Tim 1531 Irc Firmware 2.1; Siemens Simatic Wincc 16. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-232418.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-273799.pdf
• https://www.us-cert.gov/ics/advisories/icsa-19-344-04
• https://cert-portal.siemens.com/productcert/pdf/ssa-232418.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-273799.pdf
• https://www.us-cert.gov/ics/advisories/icsa-19-344-04

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