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CVE-2026-27664

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 SICAM A8000等都是德国西门子（Siemens）公司的产品。Siemens SICAM A8000是一款用于继电保护与变电站环境的保护与间隔控制单元设备。Siemens SICAM EGS是一款智能多合一网络监控传感器Siemens SICAM S8000是一系列电力自动化与变电站通信控制设备。 Siemens多款产品存在缓冲区错误漏洞，该漏洞源于解析特制XML输入时存在越界写入，可能导致服务崩溃和拒绝服务攻击。以下产品受到影响：Siemens SICAM A8000、Siemen

CVSS 7.5 · High EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-27664

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), SICORE Base system (All versions < V26.10.0). The affected application contains an out-of-bounds write vulnerability while parsing specially crafted XML inputs. This could allow an unauthenticated attacker to exploit this issue by sending a malicious XML request, which may cause the service to crash, resulting in a denial-of-service condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Siemens多款产品 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Siemens SICAM A8000等都是德国西门子（Siemens）公司的产品。Siemens SICAM A8000是一款用于继电保护与变电站环境的保护与间隔控制单元设备。Siemens SICAM EGS是一款智能多合一网络监控传感器Siemens SICAM S8000是一系列电力自动化与变电站通信控制设备。 Siemens多款产品存在缓冲区错误漏洞，该漏洞源于解析特制XML输入时存在越界写入，可能导致服务崩溃和拒绝服务攻击。以下产品受到影响：Siemens SICAM A8000、Siemen
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 SICORE Base system 0 ~ V26.10.0 -

II. Public POCs for CVE-2026-27664

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III. Intelligence Information for CVE-2026-27664

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Vendor Advisories for CVE-2026-27664 (1)

IV. Related Vulnerabilities

Same product: CPCI85 Central Processing/Communication
Same vendor: Siemens
Same weakness: CWE-787

V. Comments for CVE-2026-27664

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