Cyber Resilience

CVE-2026-33590

HighUpdated

Published: 28 May 2026

Published
28 May 2026
Modified
17 June 2026
KEV Added
—
Patch
—
CVSS Score v4 8.5 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/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 0.0045 36.1th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-33590 is a high-severity Incorrect Default Permissions (CWE-276) vulnerability in Intwave (inferred from references). Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 36.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

Insecure default settings of Portainer CE grant regular (non-admin) users privileges that allow host filesystem access and host-level code execution. An authenticated non-administrative user with endpoint access can exploit these settings to read host files or obtain root equivalent access…

more

on the host.

CWE(s)
CWE-276

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1611 Escape to Host Privilege Escalation
Adversaries may break out of a container or virtualized environment to gain access to the underlying host.
attack.mitre.org →
Why these techniques?

Insecure defaults enable non-admin to root host access (privilege escalation and container/host escape).

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

Affected Assets

Intwave
—
inferred from references and description; NVD did not file a CPE for this CVE

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.

AC-1 Policy and Procedures
addresses: CWE-276

Access control policy can specify and enforce secure default permissions for resources.

AC-6 Least Privilege
addresses: CWE-276

Guides setting of default permissions to the minimum required level.

CM-1 Policy and Procedures
addresses: CWE-276

Establishes requirements for appropriate default permissions on system resources as part of configuration management.

CM-2 Baseline Configuration
addresses: CWE-276

Baseline establishment and updates on install/upgrade ensure correct default permissions rather than insecure ones.

CM-6 Configuration Settings
addresses: CWE-276

Requiring the most restrictive settings instead of defaults prevents incorrect default permissions on resources.

CM-9 Configuration Management Plan
addresses: CWE-276

Requires documented processes that include setting and maintaining correct default permissions for configuration items.

PE-1 Policy and Procedures
addresses: CWE-276

Requires addressing secure default permissions in physical and environmental protection controls.

PL-11 Baseline Tailoring
addresses: CWE-276

Tailoring explicitly overrides or scopes default permission assignments in the baseline to match the system's actual risk and operational needs.

References