Cyber Resilience

CVE-2026-33277

HighRCE

Published: 27 April 2026

Published
27 April 2026
Modified
28 April 2026
KEV Added
—
Patch
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CVSS Score v4 8.7 CVSS: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 0.0121 64.8th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-33277 is a high-severity OS Command Injection (CWE-78) vulnerability in Jpcert Logontracer. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 35.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

CWE(s)
CWE-78

Related Threats

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 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
Why these techniques?

CWE-78 OS command injection in a server-side application directly enables remote command execution via exploitation of the vulnerable service (T1190) and use of the OS shell for arbitrary commands (T1059).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2026-28470Shared CWE-78
CVE-2025-69269Shared CWE-78
CVE-2025-24971Shared CWE-78
CVE-2026-22553Shared CWE-78
CVE-2026-22901Shared CWE-78
CVE-2026-1345Shared CWE-78
CVE-2026-6349Shared CWE-78
CVE-2025-9588Shared CWE-78
CVE-2026-24689Shared CWE-78
CVE-2025-0457Shared CWE-78

Affected Assets

jpcert
logontracer
≤ 2.0.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References