CVE-2026-2336

HIGH

Weak webstax_auth Cookie Authentication Allows Privilege Escalation

Title source: cna

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.

References (1)

[Vendor Advisory] https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication

Scores

CVSS v4 8.7

EPSS 0.0005

EPSS Percentile 14.2%

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-331

Status published

Products (1)

Microchip/IStaX < 2026.03

Published Apr 16, 2026

Tracked Since Apr 16, 2026