CVE-2026-2336
Weak webstax_auth Cookie Authentication Allows Privilege Escalation
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.
INFO
Published Date :
April 16, 2026, 6:16 p.m.
Last Modified :
Aug. 12, 2026, 4:19 p.m.
Remotely Exploit :
Yes !
Source :
dc3f6da9-85b5-4a73-84a2-2ec90b40fca5
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | dc3f6da9-85b5-4a73-84a2-2ec90b40fca5 | ||||
| CVSS 4.0 | HIGH | dc3f6da9-85b5-4a73-84a2-2ec90b40fca5 |
Solution
- Update Microchip IStaX to version 2026.03 or later.
- Apply vendor-provided patches or updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-2336.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-2336 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-2336
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-2336 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-2336 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:microchip:istax:*:*:*:*:*:linux:*:* versions up to (excluding) 2026.03 Added Reference Type Microchip Technology: https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication Types: Broken Link -
CVE Modified by dc3f6da9-85b5-4a73-84a2-2ec90b40fca5
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Microchip', 'product': 'IStaX', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2026.03', 'versionType': 'custom'}], 'defaultStatus': 'unknown'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-2336', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-16T17:34:33.723469Z'} -
New CVE Received by dc3f6da9-85b5-4a73-84a2-2ec90b40fca5
Apr. 16, 2026
Action Type Old Value New Value 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. Added CVSS V4.0 AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-331 Added Reference https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/istax-privilege-escalation-via-weak-cookie-authentication