CVE-2021-37186: siemens logo! cmr2020 firmware +5 lainnya

csirt@kutim:~/threat-intel/cve/CVE-2021-37186

CVSS 5.4 · Medium EPSS 0,36%

Kerentanan Use of Insufficiently Random Values pada siemens logo! cmr2020 firmware, siemens logo! cmr2040 firmware +4 lainnya. Skor CVSS 3.1 5.4 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD: 14 September 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 5.4 (Medium), sumber NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-330: Use of Insufficiently Random Values
EPSS (30 hari): 0,36% peluang dieksploitasi; lebih tinggi dari 27,5% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
siemens	logo! cmr2020 firmware	Semua versi sebelum 2.2
siemens	logo! cmr2040 firmware	Semua versi sebelum 2.2
siemens	simatic rtu3010c firmware	Semua versi sebelum 4.0.9
siemens	simatic rtu3030c firmware	Semua versi sebelum 4.0.9
siemens	simatic rtu3031c firmware	Semua versi sebelum 4.0.9
siemens	simatic rtu3041c firmware	Semua versi sebelum 4.0.9

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://cert-portal.siemens.com/productcert/pdf/ssa-316383.pdf patch · advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.