Description
A vulnerability has been identified in LOGO! CMR2020 (All versions < V2.2), LOGO! CMR2040 (All versions < V2.2), SIMATIC RTU3010C (All versions < V4.0.9), SIMATIC RTU3030C (All versions < V4.0.9), SIMATIC RTU3031C (All versions < V4.0.9), SIMATIC RTU3041C (All versions < V4.0.9). The underlying TCP/IP stack does not properly calculate the random numbers used as ISN (Initial Sequence Numbers). An adjacent attacker with network access to the LAN interface could interfere with traffic, spoof the connection and gain access to sensitive information.
Scores
CVSS v3
5.4
EPSS
0.0016
EPSS Percentile
37.1%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Details
CWE
CWE-330
Status
published
Products (6)
siemens/logo\!_cmr2020_firmware
< 2.2
siemens/logo\!_cmr2040_firmware
< 2.2
siemens/simatic_rtu3010c_firmware
< 4.0.9
siemens/simatic_rtu3030c_firmware
< 4.0.9
siemens/simatic_rtu3031c_firmware
< 4.0.9
siemens/simatic_rtu3041c_firmware
< 4.0.9
Published
Sep 14, 2021
Tracked Since
Feb 18, 2026