CVE-2019-10939

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-04-14 · updated 2026-06-17
Weakness: CWE-489

Description

A vulnerability has been identified in TIM 3V-IE (incl. SIPLUS NET variants) (All versions < V2.8), TIM 3V-IE Advanced (incl. SIPLUS NET variants) (All versions < V2.8), TIM 3V-IE DNP3 (incl. SIPLUS NET variants) (All versions < V3.3), TIM 4R-IE (incl. SIPLUS NET variants) (All versions < V2.8), TIM 4R-IE DNP3 (incl. SIPLUS NET variants) (All versions < V3.3). The affected versions contain an open debug port that is available under certain specific conditions. The vulnerability is only available if the IP address is configured to 192.168.1.2. If available, the debug port could be exploited by an attacker with network access to the device. No user interaction is required to exploit this vulnerability. The vulnerability impacts confidentiality, integrity, and availability of the affected device. At the stage of publishing this security advisory no public exploitation is known.

Affected products

Siemens Tim 3V-Ie Advanced Firmware: before 2.8 — fixed in 2.8
Siemens Tim 3V-Ie Dnp3 Firmware: before 2.8 — fixed in 2.8
Siemens Tim 3V-Ie Firmware: before 2.8 — fixed in 2.8
Siemens Tim 4R-Ie Dnp3 Firmware: before 3.3 — fixed in 3.3
Siemens Tim 4R-Ie Firmware: before 3.3 — fixed in 3.3

How to fix

Upgrade to a fixed version: Siemens Tim 3V-Ie Advanced Firmware 2.8; Siemens Tim 3V-Ie Dnp3 Firmware 2.8; Siemens Tim 3V-Ie Firmware 2.8; Siemens Tim 4R-Ie Dnp3 Firmware 3.3; Siemens Tim 4R-Ie Firmware 3.3. Check the vendor advisory for mitigations.

References

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