CVE-2022-31766

Severity: high (CVSS 8.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-10-11 · updated 2026-06-17
Weakness: CWE-20

Description

A vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (6GK6108-4AM00-2BA2) (All versions < V7.1.2), RUGGEDCOM RM1224 LTE(4G) NAM (6GK6108-4AM00-2DA2) (All versions < V7.1.2), SCALANCE M804PB (6GK5804-0AP00-2AA2) (All versions < V7.1.2), SCALANCE M812-1 ADSL-Router (6GK5812-1AA00-2AA2) (All versions < V7.1.2), SCALANCE M812-1 ADSL-Router (6GK5812-1BA00-2AA2) (All versions < V7.1.2), SCALANCE M816-1 ADSL-Router (6GK5816-1AA00-2AA2) (All versions < V7.1.2), SCALANCE M816-1 ADSL-Router (6GK5816-1BA00-2AA2) (All versions < V7.1.2), SCALANCE M826-2 SHDSL-Router (6GK5826-2AB00-2AB2) (All versions < V7.1.2), SCALANCE M874-2 (6GK5874-2AA00-2AA2) (All versions < V7.1.2), SCALANCE M874-3 (6GK5874-3AA00-2AA2) (All versions < V7.1.2), SCALANCE M876-3 (6GK5876-3AA02-2BA2) (All versions < V7.1.2), SCALANCE M876-3 (ROK) (6GK5876-3AA02-2EA2) (All versions < V7.1.2), SCALANCE M876-4 (6GK5876-4AA10-2BA2) (All versions < V7.1.2), SCALANCE M876-4 (EU) (6GK5876-4AA00-2BA2) (All versions < V7.1.2), SCALANCE M876-4 (NAM) (6GK5876-4AA00-2DA2) (All versions < V7.1.2), SCALANCE MUM853-1 (EU) (6GK5853-2EA00-2DA1) (All versions < V7.1.2), SCALANCE MUM856-1 (EU) (6GK5856-2EA00-3DA1) (All versions < V7.1.2), SCALANCE MUM856-1 (RoW) (6GK5856-2EA00-3AA1) (All versions < V7.1.2), SCALANCE S615 EEC LAN-Router (6GK5615-0AA01-2AA2) (All versions < V7.1.2), SCALANCE S615 LAN-Router (6GK5615-0AA00-2AA2) (All versions < V7.1.2), SCALANCE WAM763-1 (6GK5763-1AL00-7DA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WAM766-1 (6GK5766-1GE00-7DA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WAM766-1 (US) (6GK5766-1GE00-7DB0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WAM766-1 EEC (6GK5766-1GE00-7TA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WAM766-1 EEC (US) (6GK5766-1GE00-7TB0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WUM763-1 (6GK5763-1AL00-3AA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WUM763-1 (6GK5763-1AL00-3DA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WUM766-1 (6GK5766-1GE00-3DA0) (All versions >= V1.1.0 < V3.0.0), SCALANCE WUM766-1 (USA) (6GK5766-1GE00-3DB0) (All versions >= V1.1.0 < V3.0.0). Affected devices with TCP Event service enabled do not properly handle malformed packets. This could allow an unauthenticated remote attacker to cause a denial of service condition and reboot the device thus possibly affecting other network resources.

Affected products

Siemens Ruggedcom Rm1224 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M804Pb Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M812-1 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M816-1 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M826-2 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M874-2 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M874-3 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M876-3 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance M876-4 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance Mum853-1 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance Mum856-1 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance S615 Firmware: before 7.1.2 — fixed in 7.1.2
Siemens Scalance Wam763-1 Firmware: from 1.1.0
Siemens Scalance Wam766-1 Firmware: from 1.1.0
Siemens Scalance Wum763-1 Firmware: from 1.1.0
Siemens Scalance Wum766-1 Firmware: from 1.1.0

How to fix

Upgrade to a fixed version: Siemens Ruggedcom Rm1224 Firmware 7.1.2; Siemens Scalance M804Pb Firmware 7.1.2; Siemens Scalance M812-1 Firmware 7.1.2; Siemens Scalance M816-1 Firmware 7.1.2; Siemens Scalance M826-2 Firmware 7.1.2; Siemens Scalance M874-2 Firmware 7.1.2; Siemens Scalance M874-3 Firmware 7.1.2; Siemens Scalance M876-3 Firmware 7.1.2; Siemens Scalance M876-4 Firmware 7.1.2; Siemens Scalance Mum853-1 Firmware 7.1.2; Siemens Scalance Mum856-1 Firmware 7.1.2; Siemens Scalance S615 Firmware 7.1.2. Check the vendor advisory for mitigations.

References

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