CVE-2026-5935

High

Published: 23 April 2026

Published

23 April 2026

Modified

24 April 2026

KEV Added

—

Patch

—

CVSS Score 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS Score 0.0006 19.0th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-5935 is a high-severity OS Command Injection (CWE-78) vulnerability in Ibm (inferred from references). Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 19.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly mitigates the improper validation of user-supplied input that allows unauthenticated OS command injection in IBM TSSC/TS4500 IMC.

SI-2 Flaw Remediation good match

prevent

Remediates the specific command injection flaw by identifying, reporting, and applying IBM vendor patches for affected versions 9.2-9.6.

SI-4 System Monitoring partial match

detect

Monitors the system for indicators of unauthorized command executions resulting from the input validation vulnerability.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059.004 Unix Shell Execution

Adversaries may abuse Unix shell commands and scripts for execution.

attack.mitre.org →

Why these techniques?

OS command injection in a network-accessible unauthenticated management console directly enables remote arbitrary command execution via T1190 (Exploit Public-Facing Application) and T1059.004 (Unix Shell).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

IBM Total Storage Service Console (TSSC) / TS4500 IMC 9.2, 9.3, 9.4, 9.5, 9.6 TSSC/IMC could allow an unauthenticated user to execute arbitrary commands with normal user privileges on the system due to improper validation of user supplied input.

Deeper analysisAI

CVE-2026-5935 affects IBM Total Storage Service Console (TSSC) and TS4500 IMC in versions 9.2, 9.3, 9.4, 9.5, and 9.6. The vulnerability arises from improper validation of user-supplied input, enabling an unauthenticated user to execute arbitrary commands with normal user privileges on the system. Classified as CWE-78 (OS Command Injection), it carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) and was published on 2026-04-23.

An unauthenticated attacker with network access can exploit this issue with low complexity and no user interaction required. Exploitation allows execution of arbitrary commands under normal user privileges, resulting in low impacts to confidentiality, integrity, and availability.

IBM has published an advisory at https://www.ibm.com/support/pages/node/7270127 detailing the vulnerability and associated mitigations or patches.