---
id: CVE-2026-2336
title: >-
  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 privil…
summary: >-
  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 privil…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-331
vendor: microchip
product: istax
affected:
  - istax < 2026.03
patched:
  - istax 2026.03
published: '2026-04-16'
updated: '2026-08-12'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-2336'
references:
  - url: >-
      https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication
    label: dc3f6da9-85b5-4a73-84a2-2ec90b40fca5
tags:
  - nvd
epss: 0.00232
epssPercentile: 0.12539
ingestedAt: '2026-08-13T13:03:06.127Z'
---

## Overview

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.

## Affected

- `istax < 2026.03`

## Remediation

Upgrade past the affected range:

- `istax 2026.03`