A vulnerability has been identified in LOGO!

published 2017-08-30 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-4274

cvss: 7.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). An attacker who performs a Man-in-the-Middle attack between the LOGO! BM and other devices could potentially decrypt and modify network traffic.

Patch / fix

fixed in 1

siemens logo!_8_bm_firmware 8.3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-17-243-02 updated 2020-12-08 cvss 7.4

Siemens LOGO! (Update A)

Siemens LOGO! 8 BM (incl.'SIPLUS variants) <V8.3
affected: fixed in V8.3, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.14% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.4	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD	2.0	5.8	AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

Siemens LOGO! 8 BM (incl. SIPLUS variants)

Classification

Weakness

CWE-300 Channel Accessible by Non-Endpoint

References

cert-portal.siemens.com /productcert/pdf/ssa-087240.pdf
vendor-advisory
securityfocus.com /bid/100561
vdb-entry, third-party-advisory

Sources

CVE List CVE-2017-12735
NVD CVE-2017-12735

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Summary