Cyber Resilience

CVE-2024-40433

HighPublic PoC

Published: 26 July 2024

Published
26 July 2024
Modified
10 October 2025
KEV Added
—
Patch
—
CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0016 36.5th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-40433 is a high-severity Incorrect Privilege Assignment (CWE-266) vulnerability in Tencent Wechat. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 36.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

Insecure Permissions vulnerability in Tencent wechat v.8.0.37 allows an attacker to escalate privileges via the web-view component.

CWE(s)
CWE-266

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 →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
Why these techniques?

Insecure permissions in WeChat's web-view component enable privilege escalation (T1068). The CookieShareInWebView advisory indicates vulnerabilities facilitating web session cookie theft (T1539).

Affected Assets

tencent
wechat
8.0.37

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-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.

References