CVE-2026-2336CWE-331

CVE-2026-2336

High · published April 16, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
13.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00232 · 13.3th percentile
Weakness
CWE-331 · Insufficient Entropy
Published
2026-04-16T22:16Z
Affected products (1)
ProductVersionsFixed in
microchip/istax< 2026.032026.03
References (1)
https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication · dc3f6da9-85b5-4a73-84a2-2ec90b40fca5
EPSS history
Timeline
  • 16 APR 17:02Z
    Weak webstax_auth Cookie Authentication Allows Privilege Escalation
    cvelistv5