PT-2026-28357 · Unknown · Sicore Base System+1

Thomas Weber · Published 2026-03-26 · Updated 2026-04-16 · CVE-2026-27664

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions CPCI85 Central Processing/Communication versions prior to V26.10 SICORE Base system versions prior to V26.10.0

Description An out-of-bounds write issue exists when parsing specially crafted XML inputs. This could allow an unauthenticated attacker to send a malicious XML request, potentially causing a denial-of-service condition by crashing the service. Multiple reports indicate offensive activities targeting these systems.

Recommendations Update CPCI85 Central Processing/Communication to version 26.10 or later. Update SICORE Base system to version 26.10.0 or later.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-27664

Affected Products

Cpci85 Central Processing/Communication

Sicore Base System

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-27664 · Security Note
• https://twitter.com/SecurityAr58409/status/2044910466078589180 · Twitter Post
• https://twitter.com/vuldb/status/2037179168744747357 · Twitter Post
• http://seclists.org/fulldisclosure/2026/Apr/7 · Note
• https://twitter.com/vuldb/status/2037261455825994074 · Twitter Post
• https://twitter.com/syedaquib77/status/2039752705615266019 · Twitter Post
• https://twitter.com/CVEnew/status/2038135185955573791 · Twitter Post
• https://cert-portal.siemens.com/productcert/html/ssa-246443.html · Note
• https://twitter.com/syedaquib77/status/2039752707746009542 · Twitter Post