Siemens CADRA

Summary

Siemens CADRA industrial control system is vulnerable to multiple critical and high-severity vulnerabilities in bundled zlib and Foxit libraries, with CVSS scores up to 9.8. Affected versions are CADRA prior to V2511. Siemens recommends immediate patching and provides interim mitigations for systems where fixes are not yet available.

Full text

ICS Advisory Siemens CADRA Release DateJuly 21, 2026 Alert CodeICSA-26-202-06 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems 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 fixUpdate 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 fixUpdate 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 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2016-9841 inffast.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 fixUpdate to V2511 or later version Relevant CWE: CWE-20 Improper Input Validation Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2016-9842 The inflateMark function in inflate.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving left shifts of negative integers. View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA < V2511 Product Status:known_affected Remediations Vendor fixUpdate to V2511 or later version Relevant CWE: CWE-1335 Incorrect Bitwise Shift of Integer Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2017-14919 Node.js before 4.8.5, 6.x before 6.11.5, and 8.x before 8.8.0 allows remote attackers to cause a denial of service (uncaught exception and crash) by leveraging a change in the zlib module 1.2.9 making 8 an invalid value for the windowBits parameter. View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA < V2511 Product Status:known_affected Remediations Vendor fixUpdate to V2511 or later version Relevant CWE: CWE-20 Improper Input Validation Metrics CVSS Version Base Score Base Severity Vector String 3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2018-25032 zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches. View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA < V2511 Product Status:known_affected Remediations Vendor fixUpdate to V2511 or later version Relevant CWE: CWE-787 Out-of-bounds Write Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVE-2022-37434 zlib through 1.2.12 has a heap-based buffer over-read or buffer overflow in inflate in inflate.c via a large gzip header extra field. NOTE: only applications that call inflateGetHeader are affected. Some common applications bundle the affected zlib source code but may be unable to call inflateGetHeader (e.g., see the nodejs/node reference). View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA < V2511 Product Status:known_affected Remediations Vendor fixUpdate to V2511 or later version Relevant CWE: CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2023-45853 MiniZip in zlib through 1.3 has an integer overflow and resultant heap-based buffer overflow in zipOpenNewFileInZip4_64 via a long filename, comment, or extra field. NOTE: MiniZip is not a supported part of the zlib product. NOTE: pyminizip through 0.2.6 is also vulnerable because it bundles an affected zlib version, and exposes the applicable MiniZip code through its compress API. View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA < V2511 Product Status:known_affected Remediations Vendor fixUpdate to V2511 or later version Relevant CWE: CWE-190 Integer Overflow or Wraparound Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.8 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2025-10585 Type confusion in V8 in Google Chrome prior to 140.0.7339.185 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High) View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA Product Status:known_affected Remediations MitigationBlock access to untrusted or external web content from sensitive systems None availableCurrently no fix is available Relevant CWE: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2025-13223 Type Confusion in V8 in Google Chrome prior to 142.0.7444.175 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High) View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA Product Status:known_affected Remediations MitigationBlock access to untrusted or external web content from sensitive systems None availableCurrently no fix is available Relevant CWE: CWE-843 Access of Resource Using Incompatible Type ('Type Confusion') Metrics CVSS Version Base Score Base Severity Vector String 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVE-2026-22184 zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer. View CVE Details Affected Products Siemens CADRA Vendor:Siemens Product Version:CADRA Product Status:known_affected Remediations None availableCurrently no fix is available Relevant CWE: CWE-787 Out-of-bounds Write Metrics CVSS Version Base Score Base Severity Vector String 3.1 0 NONE CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N Acknowledgments Siemens ProductCERT reported these vulner

Indicators of Compromise

• cve — CVE-2005-2096
• cve — CVE-2016-9840
• cve — CVE-2016-9841
• cve — CVE-2016-9842
• cve — CVE-2017-14919
• cve — CVE-2018-25032
• cve — CVE-2022-37434
• cve — CVE-2023-45853
• cve — CVE-2025-10585
• cve — CVE-2025-13223
• cve — CVE-2026-22184

Entities