CVE-2016-8562
Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 24 March 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.61% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 3 March 2022 · due 24 March 2022
- Affected
- siemens/simatic cp 1543-1 firmware · siemens/siplus net cp 1543-1 firmware
- Source
- cve@mitre.org
EPSS 3.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2016-8562
References
- http://www.securityfocus.com/bid/94436Broken Link, Third Party Advisory, VDB Entry
- http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfBroken Link, Patch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdfVendor Advisory
- https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01Third Party Advisory, US Government Resource
- http://www.securityfocus.com/bid/94436Broken Link, Third Party Advisory, VDB Entry
- http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfBroken Link, Patch, Vendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdfVendor Advisory
- https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01Third Party Advisory, US Government Resource
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.