CVE-2026-27663

MEDIUM

6.5

CVSS Score

Published: March 26, 2026 at 02:03 PM UTC

Updated: June 17, 2026 at 10:27 AM UTC

2 products affected across 1 vendorCPCI85RTUM85 RTU Base

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Severity

MEDIUM6.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

CPCI85 · Siemens

60%

v < V26.10

Affected range stops below V26.10, so it looks safe — our inference, not a vendor statement

RTUM85 RTU Base · Siemens

60%

v < V26.10

Affected range stops below V26.10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord

https://cert-portal.siemens.com/productcert/html/ssa-246443.html

Source: af854a3a-2127-422b-91ae-364da2661108

http://seclists.org/fulldisclosure/2026/Apr/6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMsiemens

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-770

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