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TI-2026-22045 Aliases CVE-2026-27664GHSA-4m3q-v5m4-mc2x

Out-of-bounds write in Siemens CPCI85 Central Processing/Communication

Priority MEDIUM 44CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Fix Fixed CPCI85 Central Processing/Communication (Siemens): V26.10SICORE Base system (Siemens): V26.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SiemensCPCI85 Central Processing/Communicationbefore V26.10V26.10Patch availableCNA
SiemensSICORE Base systembefore V26.10.0V26.10.0Patch availableCNA
  • CPCI85 Central Processing/Communication VendorSiemens Affected before V26.10 Fixed in V26.10 Patch available CNA
  • SICORE Base system VendorSiemens Affected before V26.10.0 Fixed in V26.10.0 Patch available CNA

Remediation

  • Fix · CNA CPCI85 Central Processing/Communication (Siemens) Fixed in V26.10
  • Fix · CNA SICORE Base system (Siemens) Fixed in V26.10.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Siemens CPCI85 Central Processing/Communication V26.10

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-22044 Resource allocation without limits in Siemens CPCI85 Central Processing/CommunicationPriority LOW 31
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27664
  2. 2026-10-03 Alias added: GHSA-4m3q-v5m4-mc2x

References

Other 1

  • TI-2026-20057 Authentication bypass in Fortinet FortiWeb KEVCVSS 3.1CRITICAL 9.4
  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-18911 Heap-based buffer overflow in Fortinet FortiSwitchManager KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-09686 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-07142 Code injection in Spring Framework KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
See all 2487 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences