Vulnerability · Published Mar 26, 2026 · Assigned by siemens

CVE-2026-27663

Medium 6.5

In plain English

A medium-severity resource allocation without limits in CPCI85 Central Processing/Communication from Siemens. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 79.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Siemens	CPCI85 Central Processing/Communication	0 – before V26.10
Siemens	RTUM85 RTU Base	0 – before V26.10

Weakness: CWE-770 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

In plain English

Official description

Affected products (as reported)

References