CVE-2025-55754 Siemens CVE debrief

Who should care

Organizations running affected Apache Tomcat releases, especially on Windows systems where Tomcat logs are viewed in an ANSI-capable console. Administrators responsible for exposed Tomcat instances, and teams still using EOL Tomcat 8.5.x builds, should prioritize this immediately.

Technical summary

The flaw is an improper neutralization issue (CWE-150) in Tomcat log handling. Instead of escaping ANSI control sequences before writing log content, Tomcat could pass attacker-supplied escape sequences through to the console. The practical risk described in the advisory is console and clipboard manipulation that could mislead an administrator into executing a malicious command. The published CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H, which reflects remote reachability but requires user interaction. The advisory fixes this in Apache Tomcat 11.0.11+, 10.1.45+, and 9.0.109+.

Defensive priority

Immediate

Recommended defensive actions

• Upgrade Apache Tomcat to 11.0.11 or later, 10.1.45 or later, or 9.0.109 or later.
• If you rely on an affected EOL branch such as 8.5.60 through 8.5.100, migrate to a supported fixed release path as soon as possible.
• Treat any Tomcat deployment that writes logs to an interactive console as high risk until patched, especially on Windows with ANSI support enabled.
• Review administrative workflows so operators do not copy or execute commands from console output without validation.
• Use the linked vendor and CISA advisories to confirm affected product lines and any environment-specific remediation guidance.

Evidence notes

The source advisory explicitly states that Tomcat did not escape ANSI escape sequences in log messages and that specially crafted URLs could inject control sequences. It also states no attack vector was found, while noting the possibility of impact on other operating systems. The advisory was republished by CISA from Siemens ProductCERT content. Source metadata contains a product/vender mismatch ('Siemens SIMATIC CN 4100 vers:intdot/<5.0') versus an Apache Tomcat description, so the product mapping should be treated cautiously; the vulnerability details themselves consistently describe Apache Tomcat.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.