CVE-2026-21655

Awaiting Analysis Awaiting Analysis - Queue

Deserialization of Untrusted Data in Johnson Controls victor

Publication date: 2026-07-23

Last updated on: 2026-08-06

Assigner: Johnson Controls

Description

Deserialization of untrusted data vulnerability in Johnson Control victor on Windows, Johnson Controls CCure 9000, and Johnson Controls Victor Application Server allows capec-586. This issue affects victor: before 8.0; CCure 9000: before 3.2; Victor Application Server: before 4.1.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-23

Last Modified

2026-08-06

Generated

2026-08-13

AI Q&A

2026-07-24

EPSS Evaluated

2026-08-11

NVD

CVE-2026-21655

Affected Vendors & Products

Vendor	Product	Version / Range
johnson_control	victor	From 2.9 (inc) to 3.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

This is a deserialization of untrusted data vulnerability in Johnson Controls victor software running on Windows. It allows attackers to execute arbitrary code by exploiting improper handling of serialized data, as described in CAPEC-586.

Detection Guidance

Detection methods for this deserialization vulnerability are not specified in the provided CVE details. General approaches include monitoring for unusual network traffic patterns, inspecting logs for deserialization errors, and using vulnerability scanners that support CVE-2026-21655. Check for updates or advisories from Johnson Controls for specific detection guidance.

Impact Analysis

An attacker could exploit this to gain unauthorized access, execute malicious code, or disrupt operations on systems running vulnerable versions of victor software. This could lead to data breaches, system compromise, or operational disruptions.

Compliance Impact

The vulnerability involves deserialization of untrusted data, which could allow unauthorized access or manipulation of systems. This may impact compliance with GDPR by risking data integrity and confidentiality, and with HIPAA by potentially exposing protected health information. However, specific compliance impacts are not detailed in the provided CVE data.

Mitigation Strategies

Update Johnson Controls victor software to version 3.0 or later to address the deserialization vulnerability. Ensure all systems running affected versions are patched immediately.

Hi! I’m here to help you understand CVE-2026-21655. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70