7.8

CVE-2016-9158: siemens ag simatic s7-300 cpu family Improper Input Validation

CVSS: 7.8v2.0HighModified
Published 17-12-2016Last modified 02-06-2026
Open JSON

Vulnerability summary

CVE-2016-9158 is a high (CVSS 7.8) Improper Input Validation vulnerability in siemens ag simatic s7-300 cpu family. EPSS estimates a 3.03% chance of exploitation in the next 30 days, higher than 87.2% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v2.0 (NVD)
EPSS score
3.03%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-12-2016
    PublishedVulnerability first disclosed.
  2. 02-06-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (All versions), SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 V6 and earlier CPU family (All versions), SIMATIC S7-400 V7 CPU family (All versions). Specially crafted packets sent to port 80/tcp could cause the affected devices to go into defect mode. A cold restart is required to recover the system.

CVSS metrics

4 scores · 2 sources · 3 versions

EPSS trend

Probability

3.03%

Chance of exploitation in the next 30 days

Percentile

87%

Versus all other CVEs

30-day change

0.00 pp

From 3.03% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.03%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Siemens ag6 products
Siemens2 products

2 vendors · 8 products

References

5 links