CVE-2016-9842
Actively exploited. CVE-2016-9842 is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
View CSAF Summary CADRA is affected by multiple zlib and Foxit vulnerabilities. Siemens has released a new version for CADRA and recommends to update to the latest version. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available. The following versions of Siemens CADRA are affected: CADRA vers:intdot/<2511, vers:all/* CVSS Vendor Equipment Vulnerabilities v3 9.8 Siemens Siemens CADRA Improper Input Validation, Incorrect Bitwise Shift of Integer, Out-of-bounds Write, Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), Integer Overflow or Wraparound, Access of Resource Using Incompatible Type ('Type Confusion') Background Critical Infrastructure Sectors: Chemical, Commercial Facilities, Communications, Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Germany Vulnerabilities Expand All + CVE-2005-2096 zlib 1.2 and later versions allows remote attackers to cause a denial of service (crash) via a crafted compressed stream with an incomplete code description of a length greater than 1, which leads to a buffer overflow, as demonstrated using a crafted PNG file. View CVE Details Affected Products Siemens CADRA Vendor: Siemens Product Version: CADRA < V2511 Product Status: known_affected Remediations Vendor fix Update to V2511 or later version Relevant CWE: CWE-20 Improper Input Validation Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.3 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVE-2016-9840 inftrees.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact by leveraging improper pointer arithmetic. View CVE Details Affected Products Siemens CADRA Vendor: Siemens Product Version: CADRA < V2511 Product Status: known_affected Remediations Vendor fix Update to V2511 or later version Relevant CWE: CWE-20 Improper Input Validation Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH C
CSIRTS triage
- What
- CADRA is affected by multiple vulnerabilities related to zlib and Foxit.
- Who is affected
- All deployments of Siemens CADRA versions below 2511 are affected.
- Urgency
- Remediation is critical due to the severity of the vulnerabilities and active exploitation.
- Action
- Update to the latest version of Siemens CADRA.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 92% of all EPSS-scored CVEs.
Advisory coverage (2)
- criticalexploitedSiemens CADRAcisa · 2026-07-21
- unknownNCSC-2026-0229 [1.00] [M/H] Vulnerabilities fixed in Siemens productsncsc-nl · 2026-07-14
External references
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