CVE-2016-9154 — Siemens Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 for Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D (All firmware versions < V6.00.046) and Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 for Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U (All firmware versions < V6.00.046) use a pseudo random number generator with insufficient entropy to generate certificates for HTTPS, potentially allowing remote attackers to reconstruct the corresponding private key

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HIGH

Siemens Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 for Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D (All firmware versions < V6.00.046) and Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 for Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U (All firmware versions < V6.00.046) use a pseudo random number generator with insufficient entropy to generate certificates for HTTPS, potentially allowing remote attackers to reconstruct the corresponding private key

Published Dec 23, 2016

7.5

HIGH

CVSS 3.0

EPSS 1.50%

Description

Siemens Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 for Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D (All firmware versions < V6.00.046) and Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 for Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U (All firmware versions < V6.00.046) use a pseudo random number generator with insufficient entropy to generate certificates for HTTPS, potentially allowing remote attackers to reconstruct the corresponding private key.

Affected products

Vendor n/a Product Desigo PX Web modules with all firmware versions < V6.00.046 Default
n/a
- Version
  Desigo PX Web modules with all firmware versions < V6.00.046
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

n/a

Desigo PX Web modules with all firmware versions < V6.00.046

n/a

Version	Status	Constraints
Desigo PX Web modules with all firmware versions < V6.00.046	affected	-

Remediation

No remediation recorded yet.

Metrics

1.50% 0.01499

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01499

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.50% (0.01499)	73.31th	v5 (v2026.06.15)
Jun 15, 2026	1.50% (0.01499)	70.82th	v5 (v2026.06.15)
Mar 17, 2025	0.87% (0.00867)	73.55th	v4 (v2025.03.14)
Dec 12, 2024	0.25% (0.00251)	65.55th	v3 (v2023.03.01)
Feb 8, 2024	0.25% (0.00251)	64.07th	v3 (v2023.03.01)
Mar 7, 2023	0.25% (0.00251)	61.17th	v3 (v2023.03.01)
Mar 6, 2023	1.14% (0.01136)	59.45th	v2 (v2022.01.01)
Oct 18, 2022	1.14% (0.01136)	58.28th	v2 (v2022.01.01)
Apr 1, 2022	1.14% (0.01136)	56.27th	v2 (v2022.01.01)
Feb 4, 2022	1.14% (0.01136)	34.23th	v2 (v2022.01.01)

Weaknesses (1)

CWE-332

References (3)

http://www.securityfocus.com/bid/94962
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-856492.pdf
x_refsource_CONFIRMMitigationVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-355-01
x_refsource_MISCThird Party AdvisoryUS Government Resource

Link	Providers	Tags
http://www.securityfocus.com/bid/94962		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-856492.pdf		x_refsource_CONFIRMMitigationVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-355-01		x_refsource_MISCThird Party AdvisoryUS Government Resource

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner siemens

Published Dec 23, 2016

Updated Aug 6, 2024

Reserved Nov 3, 2016

Link CVE-2016-9154

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2016-9154

Red Hat

Severity n/a

Public date n/a

Links CVE-2016-9154