Cyber Resilience

CVE-2026-5967

RCE in Teamt5 Threatsonar Anti-Ransomware ≤ 4.0.0

RCECommand Injection
Published
20 April 2026
Modified
12 May 2026
CVSS Score v4 8.7
Click a component to see what it means
Raw vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0037 30th percentile
Risk Priority 39 floored blend · peak EPSS

Summary

CVE-2026-5967 is a high-severity OS Command Injection (CWE-78) vulnerability in Teamt5 Threatsonar Anti-Ransomware. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked at the 30th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2026-5967 is a privilege escalation vulnerability in ThreatSonar Anti-Ransomware, a product developed by TeamT5. The flaw enables authenticated remote attackers with shell access to inject operating system commands, which then execute with root privileges. Classified under CWE-78 (OS Command Injection), it received a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) upon publication on 2026-04-20.

Attackers require low privileges, specifically authentication and remote shell access to the affected system, to exploit this vulnerability over the network with low complexity and no user interaction. Successful exploitation allows injection and execution of arbitrary OS commands as root, resulting in high impacts to confidentiality, integrity, and availability, potentially leading to full system compromise.

Advisories from TWCERT/CC, available at https://www.twcert.org.tw/en/cp-139-10855-e6d1b-2.html and https://www.twcert.org.tw/tw/cp-132-10854-03015-1.html, provide further details on the vulnerability and mitigation guidance.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

ThreatSonar Anti-Ransomware developed by TeamT5 has an Privilege Escalation vulnerability. Authenticated remote attackers with shell access can inject OS commands and execute them with root privileges.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
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 →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-7694Same product: Teamt5 Threatsonar Anti-Ransomware
CVE-2026-5966Same product: Teamt5 Threatsonar Anti-Ransomware
CVE-2024-0292Shared CWE-78
CVE-2023-40479Shared CWE-78
CVE-2025-33206Shared CWE-78
CVE-2026-32608Shared CWE-78
CVE-2024-9916Shared CWE-78
CVE-2026-8665Shared CWE-78
CVE-2026-71950Shared CWE-78
CVE-2024-32123Shared CWE-78

Affected Assets

teamt5
threatsonar anti-ransomware
≤ 4.0.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and evaluation can discover missing or incorrect command sanitization during development.

SI-10 Information Input Validation good match

Input validation directly neutralizes or rejects special characters that would otherwise alter OS command structure.

AC-6 Least Privilege partial match

Least privilege reduces the permissions available to any process that could be subverted by injected commands.

CM-7 Least Functionality partial match

Least functionality restricts available OS commands and interpreters, limiting the blast radius of injection.

SA-8 Security and Privacy Engineering Principles partial match

Secure engineering principles require proper neutralization of untrusted input before command construction.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References