How severe is CVE-2026-2336?

CVE-2026-2336 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-2336 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2336?

CVE-2026-2336 affects Microchip Istax. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2336?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-2336 have an EU (EUVD) identifier?

Yes. CVE-2026-2336 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23272.

When was CVE-2026-2336 published?

CVE-2026-2336 was published on 2026-04-16 and last updated on 2026-08-12.

CVE-2026-2336

CVE-2026-2336 is a high-severity vulnerability in Microchip Istax with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23272
Weakness: CWE-331
Affected product: Microchip Istax
Published: 2026-04-16
Last modified: 2026-08-12

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.

Frequently asked questions

What is CVE-2026-2336?: 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.
How severe is CVE-2026-2336?: CVE-2026-2336 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-2336 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2336?: CVE-2026-2336 affects Microchip Istax. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2336?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-2336 have an EU (EUVD) identifier?: Yes. CVE-2026-2336 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23272.
When was CVE-2026-2336 published?: CVE-2026-2336 was published on 2026-04-16 and last updated on 2026-08-12.

References

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

Affected products (1)

cpe:2.3:a:microchip:istax:*:*:*:*:*:linux:*:*

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