CVE-2016-8562: Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability
Vulnerability summary
CVE-2016-8562 is a high (CVSS 7.5) vulnerability in Siemens SIMATIC CP. It is known to be exploited: CISA lists it, first on 03-03-2022. EPSS estimates a 3.61% chance of exploitation in the next 30 days, higher than 89.3% of scored vulnerabilities.
Timeline
- 18-11-2016PublishedVulnerability first disclosed.
- 03-03-2022Added to CISA KEVSiemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability
- 24-03-2022CISA remediation dueApply updates per vendor instructions.
- 21-10-2025Last modifiedVulnerability information updated.
Description
A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.61%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
0.00 pp
From 3.61% on 18-09-2026
Known exploited
Compare KEV catalogs
CISA KEVListed- Added
- 03-03-2022
- Federal due date
- 24-03-2022
CISA required action
Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2016-8562
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Siemens2 products
- simatic_cp_1543-1_firmware< 2.0.28
- siplus_net_cp_1543-1_firmware< 2.0.28
1 vendor · 2 products
References
5 links- ics-cert.us-cert.gov/advisories/ICSA-16-327-01X Refsource MISCThird Party AdvisoryUS Government Resource
- www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfX Refsource CONFIRMBroken LinkPatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562Government ResourceUS Government Resource