How severe is CVE-2026-8363?

CVE-2026-8363 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-2026-8363 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-8363?

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-2026-8363 have an EU (EUVD) identifier?

Yes. CVE-2026-8363 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32642.

When was CVE-2026-8363 published?

CVE-2026-8363 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-8363

CVE-2026-8363 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-32642
Weakness: CWE-121
Published: 2026-05-27
Last modified: 2026-06-17

Description

A stack-based buffer overflow condition exists in WOSDeviceDropFolder.dll when processing a long URL path starting with /resources:

Frequently asked questions

What is CVE-2026-8363?: A stack-based buffer overflow condition exists in WOSDeviceDropFolder.dll when processing a long URL path starting with /resources:
How severe is CVE-2026-8363?: CVE-2026-8363 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-2026-8363 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-8363?: 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-2026-8363 have an EU (EUVD) identifier?: Yes. CVE-2026-8363 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32642.
When was CVE-2026-8363 published?: CVE-2026-8363 was published on 2026-05-27 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/TRA-2026-45

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