How severe is CVE-2026-36829?

CVE-2026-36829 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-36829 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-36829?

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.

Does CVE-2026-36829 have an EU (EUVD) identifier?

Yes. CVE-2026-36829 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30953.

When was CVE-2026-36829 published?

CVE-2026-36829 was published on 2026-05-19 and last updated on 2026-06-17.

CVE-2026-36829

CVE-2026-36829 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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-22.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30953
Weakness: CWE-22
Published: 2026-05-19
Last modified: 2026-06-17

Description

An authentication bypass vulnerability exists in the embedded HTTP server of Panabit PAP-XM320 up to and including v7.7. The server validates session cookies using a filesystem existence check based on a user-controlled cookie value without proper sanitization, allowing directory traversal and bypass of authentication.

Frequently asked questions

What is CVE-2026-36829?: An authentication bypass vulnerability exists in the embedded HTTP server of Panabit PAP-XM320 up to and including v7.7. The server validates session cookies using a filesystem existence check based on a user-controlled cookie value without proper sanitization, allowing directory traversal and bypass of authentication.
How severe is CVE-2026-36829?: CVE-2026-36829 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-36829 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-36829?: 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.
Does CVE-2026-36829 have an EU (EUVD) identifier?: Yes. CVE-2026-36829 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30953.
When was CVE-2026-36829 published?: CVE-2026-36829 was published on 2026-05-19 and last updated on 2026-06-17.

References

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