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CVE-2026-27663

Quick assessment

Affected
Siemens CPCI85 Central Processing/Communication
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Siemens CPCI85 Central Processing是德国西门子（Siemens）公司的一个计算机处理器。 Siemens CPCI85 Central Processing/Communication V26.10之前版本和RTUM85 RTU Base V26.10之前版本存在安全漏洞，该漏洞源于远程操作模式存在资源耗尽问题，可能导致拒绝服务攻击。

CVSS 6.5 · Medium EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-27663

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens CPCI85 Central Processing 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens CPCI85 Central Processing是德国西门子（Siemens）公司的一个计算机处理器。 Siemens CPCI85 Central Processing/Communication V26.10之前版本和RTUM85 RTU Base V26.10之前版本存在安全漏洞，该漏洞源于远程操作模式存在资源耗尽问题，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Siemens CPCI85 Central Processing/Communication 0 ~ V26.10 -
Siemens RTUM85 RTU Base 0 ~ V26.10 -

II. Public POCs for CVE-2026-27663

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III. Intelligence Information for CVE-2026-27663

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Vendor Advisories for CVE-2026-27663 (1)

IV. Related Vulnerabilities

Same product: CPCI85 Central Processing/Communication
Same vendor: Siemens
Same weakness: CWE-770

V. Comments for CVE-2026-27663

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