What’s Vulnerable › Vulnerabilities

CVE-2026-27663

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-26 · updated 2026-06-17
• Weakness: CWE-770

Description

A vulnerability has been identified in CPCI85 Central Processing/Communication (All versions < V26.10), RTUM85 RTU Base (All versions < V26.10). The affected application contains denial-of-service (DoS) vulnerability. The remote operation mode is susceptible to a resource exhaustion condition when subjected to a high volume of requests. Sending multiple requests can exhaust resources, preventing parameterization and requiring a reset or reboot to restore functionality.

Affected products

• Siemens CPCI85 Central Processing/Communication: before V26.10 — fixed in V26.10
• Siemens RTUM85 RTU Base: before V26.10 — fixed in V26.10

How to fix

Upgrade to a fixed version: Siemens CPCI85 Central Processing/Communication V26.10; Siemens RTUM85 RTU Base V26.10. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/html/ssa-246443.html
• http://seclists.org/fulldisclosure/2026/Apr/6

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