VulnerabilityAnalyzed
CVE-2026-6533
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
MEDIUM 5.5EPSS 0.15%
Does this matter?
Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.
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
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 0.15% probability · 4th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1325
- Affected
- wireshark/wireshark
- Source
- cve@gitlab.com
References
- https://gitlab.com/wireshark/wireshark/-/issues/21127Exploit, Issue Tracking, Third Party Advisory
- https://www.wireshark.org/security/wnpa-sec-2026-28.htmlVendor Advisory
- https://gitlab.com/wireshark/wireshark/-/work_items/21127Exploit, Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.