Vulnerability

CVE-2016-8562

High· 7.5KEVCVSS7.5EPSS4%

.rules3/5

Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.

Threat signal

86/100

High

Severity

high

CVSS

7.5

EPSS

Active

KEV

CISA KEV — actively exploited

1545d overdue

AffectedSiemens — SIMATIC CP

Added to KEV

2022-03-03

Federal patch due (BOD 22-01)

2022-03-24

Required action (CISA verbatim)

Apply updates per vendor instructions.

Vendor advisory + references

https://nvd.nist.gov/vuln/detail/CVE-2016-8562

CISA description: “An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.”

CVSS

v3.1Open in FIRST calculator →

7.5/ 10HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredLowStandard user privileges sufficient.
User InteractionNoneFully automated — no victim action needed.
ScopeUnchangedImpact contained to the vulnerable component.
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

3.62%

probability of exploitation in next 30 days

p88

higher than 88% of all CVEs

6-day trend↓ 14.9pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2016-8562. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: no
impact: total
mission: support

Lifecycle

2022-03-03Added to CISA KEVransomware: Unknown
2022-03-03Published
2022-03-24Federal patch due (BOD 22-01)
2026-06-15Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.