TI-2017-07306 Aliases CVE-2017-9938 GHSA-gr6m-h2q8-p89j

Out-of-bounds write in SIMATIC Logon All versions before V1.6

LOW 38CWE-787Published 2017-08-08 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A vulnerability was discovered in Siemens SIMATIC Logon (All versions before V1.6) that could allow specially crafted packets sent to the SIMATIC Logon Remote Access service on port 16389/tcp to cause a Denial-of-Service condition. The service restarts automatically.

Why it matters now

EPSS 0.02897 87th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

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
—	SIMATIC Logon All versions before V1.6	SIMATIC Logon All versions before V1.6	—	No fix listed	CNA

SIMATIC Logon All versions before V1.6 Vendor— Affected SIMATIC Logon All versions before V1.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:siemens:simatic_logon::sp3_update_2::::::*	up to 1.5	Vulnerable	Siemens

cpe:2.3:a:siemens:simatic_logon:*:sp3_update_2:*:*:*:*:*:* Versions up to 1.5 Vulnerable ·Siemens

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-9938
2026-10-03 Alias added: GHSA-gr6m-h2q8-p89j

References

Advisory 1

https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-804859.pdf

Other 1

https://www.tenable.com/security/research/tra-2017-34

TI-2021-02413 NULL pointer deref in signature_algorithms processing CVSS 3.1MEDIUM 5.9
TI-2017-01926 Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge… CVSS 3.0CRITICAL 9.0

Sources

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