CVE-2026-2336

Weak webstax_auth Cookie Authentication Allows Privilege Escalation

Published Apr 16, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Workaround

Restrict access to the management interface to trusted networks and trusted users until devices can be upgraded.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:microchip:istax:*:*:*:*:*:linux:*:*
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
First Time appeared Microchip
Microchip istax
Vendors & Products Microchip
Microchip istax
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Weak webstax_auth Cookie Authentication Allows Privilege Escalation
Weaknesses CWE-331
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Microchip
Published
Updated
Apr 16, 2026, 5:34 PM
Reserved
Feb 11, 2026, 10:30 AM
Status
Analyzed
Published
Apr 16, 2026, 6:16 PM
Modified
Oct 26, 2026, 9:10 PM