How severe is CVE-2026-33591?

CVE-2026-33591 has a CVSS 4.0 base score of 10.0, rated critical severity.

Is CVE-2026-33591 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33591?

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

When was CVE-2026-33591 published?

CVE-2026-33591 was published on 2026-08-03.

CVE-2026-33591

CVE-2026-33591 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. 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-288.

Key facts

Severity: Critical (CVSS 4.0 base score 10.0)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-288
Published: 2026-08-03
Last modified: 2026-08-03

Description

A vulnerability in Wapt Server before version 2.6.1.17813 allows a remote unauthenticated attacker to bypass security restriction using a specially crafted packet and retrieve a valid session token for the targeted account.

Frequently asked questions

What is CVE-2026-33591?: A vulnerability in Wapt Server before version 2.6.1.17813 allows a remote unauthenticated attacker to bypass security restriction using a specially crafted packet and retrieve a valid session token for the targeted account.
How severe is CVE-2026-33591?: CVE-2026-33591 has a CVSS 4.0 base score of 10.0, rated critical severity.
Is CVE-2026-33591 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-33591?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-33591 published?: CVE-2026-33591 was published on 2026-08-03.

References

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