TI-2020-15471 Aliases CVE-2020-25234 GHSA-66q5-93c3-xq5w

A vulnerability has been identified in LOGO! 8 BM (incl.

LOW 34CWE-321Published 2020-12-14 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-321.

Summary

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort (All versions < V8.3). The LOGO! program files generated and used by the affected components offer the possibility to save user-defined functions (UDF) in a password protected way. This protection is implemented in the software that displays the information. An attacker could reverse engineer the UDFs directly from stored program files.

Why it matters now

EPSS 0.00318 24th percentileScored 2026-11-07

Fix Fixed LOGO! 8 BM (incl. SIPLUS variants) (Siemens): V8.3LOGO! Soft Comfort (Siemens): V8.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Siemens	LOGO! 8 BM (incl. SIPLUS variants)	before V8.3	V8.3	Patch available	CNA
Siemens	LOGO! Soft Comfort	before V8.3	V8.3	Patch available	CNA

LOGO! 8 BM (incl. SIPLUS variants) VendorSiemens Affected before V8.3 Fixed in V8.3 Patch available CNA
LOGO! Soft Comfort VendorSiemens Affected before V8.3 Fixed in V8.3 Patch available CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:siemens:logo\!_8_bm_firmware::::::::	before 8.3	Vulnerable	Siemens
cpe:2.3:h:siemens:logo\!_8_bm:-:::::::*	not specified by NVD	Running on	Siemens

cpe:2.3:o:siemens:logo\!_8_bm_firmware:*:*:*:*:*:*:*:* Versions before 8.3 Vulnerable ·Siemens
cpe:2.3:h:siemens:logo\!_8_bm:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Siemens

Remediation

Fix · CNA LOGO! 8 BM (incl. SIPLUS variants) (Siemens) Fixed in V8.3
Fix · CNA LOGO! Soft Comfort (Siemens) Fixed in V8.3

Timeline

2026-10-02 Threatist record created from CVE-2020-25234
2026-10-03 Alias added: GHSA-66q5-93c3-xq5w

References

Advisory 1

https://cert-portal.siemens.com/productcert/pdf/ssa-480824.pdf

TI-2020-06115 Buffer overflow in Siemens LOGO! 8 BM CVSS 3.1CRITICAL 9.8
TI-2022-16702 Buffer overflow in Siemens LOGO! 12/24RCE CVSS 3.1CRITICAL 9.8
TI-2020-15465 Missing authentication in Siemens LOGO! 8 BM CVSS 3.1CRITICAL 9.8
TI-2020-06111 Missing authentication in Siemens LOGO! 8 BM CVSS 3.1CRITICAL 9.1
TI-2020-15472 Insufficiently protected credentials in Siemens LOGO! 8 BM CVSS 3.1HIGH 7.5
TI-2022-16703 Improper input validation in Siemens LOGO! 12/24RCE CVSS 3.1HIGH 7.5

See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences