Is CVE-2026-6533 in the CISA KEV catalog?

No. CVE-2026-6533 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-6533?

CVE-2026-6533 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2026-6533?

CVE-2026-6533 has an EPSS score of 0.15% (4th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-6533?

Upgrade wireshark on debian 13 to 4.4.15-0+deb13u1 or later.

CVE & CISA-KEV Catalog

CVE-2026-6533

MEDIUM

5.5

CVSS v3

NVD

Description

Dissection engine LZ77 decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

CWE-1325

How to fix

Remediation Available

wiresharkDebian

Fixed in:4.4.15-0+deb13u1CVE-2026-6533

Fixed in:4.6.5-1CVE-2026-6533

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

0.15%probability of exploitation in 30 days

4thpercentile

Low risk: more likely to be exploited than 4% of all known CVEs.

References

Exploit2

Vendor Advisory1

wireshark.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-01.