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.

Published: 2016-12-23 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9154 is rated Moderate Risk (55.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.50%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-9154

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.17% 1.50% +0.33%
2 2025-12-13 0.87% 1.17% +0.30%
3 2025-03-30 — 0.87% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9154

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-9154

Affected software / configurations for CVE-2016-9154

Vendor Product Version Raw CPE
siemens desigo_web_module_pxa30-w0_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa30-w0_firmware:*:*:*:*:*:*:*:*
siemens desigo_web_module_pxa30-w1_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa30-w1_firmware:*:*:*:*:*:*:*:*
siemens desigo_web_module_pxa30-w2_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa30-w2_firmware:*:*:*:*:*:*:*:*
siemens desigo_web_module_pxa40-w0_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa40-w0_firmware:*:*:*:*:*:*:*:*
siemens desigo_web_module_pxa40-w1_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa40-w1_firmware:*:*:*:*:*:*:*:*
siemens desigo_web_module_pxa40-w2_firmware <= 6.00.00 cpe:2.3:a:siemens:desigo_web_module_pxa40-w2_firmware:*:*:*:*:*:*:*:*

References for CVE-2016-9154

URL Tags
http://www.securityfocus.com/bid/94962 Third Party Advisory VDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-856492.pdf Mitigation Vendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-355-01 Third Party Advisory US Government Resource
cvelogic Threat Intelligence