CVE-2026-2336

Weak webstax_auth Cookie Authentication Allows Privilege Escalation

State: Published
Severity: 8.7 High
Published: Apr 16, 2026
Updated: Apr 16, 2026
Reserved: Feb 11, 2026

Description

A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstax_auth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H	Microchip

Weaknesses

CWE-331 Insufficient entropy

Affected Products

Product	Versions
IStaXMicrochip	before 2026.03Affected

References

https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authenticationvendor-advisory

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