What’s Vulnerable › Vulnerabilities

CVE-2026-27664

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% 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-787

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.

Affected products

• Siemens CPCI85 Central Processing/Communication: before V26.10 — fixed in V26.10
• Siemens SICORE Base system: before V26.10.0 — fixed in V26.10.0

How to fix

Upgrade to a fixed version: Siemens CPCI85 Central Processing/Communication V26.10; Siemens SICORE Base system V26.10.0. Check the vendor advisory for mitigations.

References

• https://cert-portal.siemens.com/productcert/html/ssa-246443.html
• http://seclists.org/fulldisclosure/2026/Apr/7

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