PT-2016-7672 · Siemens · Simatic S7-300+4

Zhu Wenzhe · Published 2016-12-17 · Updated 2026-06-02 · CVE-2016-9158

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions SIMATIC S7-300 CPU family versions all SIMATIC S7-400 PN/DP V6 and below CPU family versions all SIMATIC S7-400 PN/DP V7 CPU family versions all SIMATIC S7-400 V6 and earlier CPU family versions all SIMATIC S7-400 V7 CPU family versions all

Description A vulnerability has been identified that can be exploited by sending specially crafted packets to port 80/tcp, causing the affected devices to go into defect mode. A cold restart is required to recover the system.

Recommendations For SIMATIC S7-300 CPU family, avoid using port 80/tcp until a fix is available. For SIMATIC S7-400 PN/DP V6 and below CPU family, restrict access to port 80/tcp to minimize the risk of exploitation. For SIMATIC S7-400 PN/DP V7 CPU family, consider disabling the affected port until a patch is available. For SIMATIC S7-400 V6 and earlier CPU family, restrict access to the vulnerable component to prevent exploitation. For SIMATIC S7-400 V7 CPU family, as a temporary workaround, consider implementing additional security measures to prevent specially crafted packets from being sent to port 80/tcp.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2016-9158

Affected Products

Simatic S7-300

Simatic S7-400 Pn/Dp V6

Simatic S7-400 Pn/Dp V7

Simatic S7-400 V6

Simatic S7-400 V7

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2016-9158 · Security Note
• https://cert-portal.siemens.com/productcert/pdf/ssa-731239.pdf · Note
• http://securityfocus.com/bid/94820 · Note
• https://ics-cert.us-cert.gov/advisories/ICSA-16-348-05 · Note
• http://securitytracker.com/id/1037434 · Note
• https://siemens.com/cert/pool/cert/siemens_security_advisory_ssa-731239.pdf · Note
• https://t.me/cveNotify/165717 · Telegram Post