Cyber Posture

CVE-2026-42758

Critical
Microsoft: not affectedMSmacOS: not affectedMacLinux: not affectedLnxMobile: not affectedMobNetwork: not affectedNetApplication: not affectedAppOther: affectedOth

Published: 27 May 2026

Published
27 May 2026
Modified
27 May 2026
KEV Added
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Patch
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CVSS Score 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0004 12.9th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-42758 is a critical-severity Incorrect Privilege Assignment (CWE-266) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 12.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploitation for Privilege Escalation (T1068).
Threat & Defense Details

Likely Mitigating ControlsAI

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-266

Designation of a manager and policy dissemination ensures privileges are assigned according to defined roles.

AC-13 Supervision and Review — Access Control
addresses: CWE-266

Regular reviews catch incorrect privilege assignments to users, roles, or processes.

AC-2 Account Management
addresses: CWE-266

Explicitly specifying privileges and group/role memberships for accounts reduces the risk of incorrect privilege assignments.

AC-5 Separation of Duties
addresses: CWE-266

The control requires explicit definition of separated access authorizations, making incorrect privilege assignments that bundle conflicting duties harder to implement.

AC-6 Least Privilege
addresses: CWE-266

Ensures privileges are assigned only as necessary rather than incorrectly over-granted.

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 →
Why these techniques?

Direct mapping from incorrect privilege assignment (CWE-266) to exploitation for privilege escalation.

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

NVD Description

Incorrect Privilege Assignment vulnerability in Saleswonder Team: Tobias WebinarIgnition webinar-ignition allows Privilege Escalation.This issue affects WebinarIgnition: from n/a through < 4.08.253.

Deeper analysisAI

Automated synthesis unavailable for this CVE.

Details

CWE(s)
CWE-266
OWASP Top 10 Web 2025
A06:2025

EU & UK References

Regulatory context (EU CRA / NIS2 / DORA / UK NIS Regulations)

EU Cyber Resilience Act — coordinated disclosure

Critical and high-severity vulnerabilities in products with digital elements may trigger coordinated-disclosure obligations under the EU Cyber Resilience Act (CRA, Regulation 2024/2847). Manufacturers placing products on the EU market must notify ENISA and the relevant CSIRTs without undue delay once active exploitation is known.

References