CVE-2026-6533

FAUCET Score

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

First published: Apr 30, 2026Last modified: Apr 30, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		>= 4.4.9, < 4.4.15CPE match	cpe:2.3:a:wireshark:wireshark::::::::
		>= 4.6.0, < 4.6.5CPE match	cpe:2.3:a:wireshark:wireshark::::::::
		>= 4.4.0, <= 4.4.14CPE matchmatch criteria	cpe:2.3:a:wireshark:wireshark::::::::
		>= 4.6.0, <= 4.6.4CPE matchmatch criteria	cpe:2.3:a:wireshark:wireshark::::::::

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.15%

Probability of exploitation in next 30 days

EPSS Percentile

4.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-24

Model: v2026.06.15

This CVE's current EPSS score of 0.0015 is in the 6th percentile among its peer group of 5,758 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gitlab.com / wireshark/wireshark/-/work_items/21127

ExploitIssue TrackingThird Party Advisory

gitlab.com / wireshark/wireshark/-/issues/21127

ExploitIssue TrackingThird Party Advisory

wireshark.org / security/wnpa-sec-2026-28.html

Vendor Advisory