CVE-2026-76919

MEDIUM 5.3

Use of Uninitialized Variable in Wireshark

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

ESS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CWE	CWE-457
Vendor	wireshark foundation
Product	wireshark
Published	Aug 19, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

Wireshark Foundation / Wireshark

4.6.0 < 4.6.8 4.4.0 < 4.4.18

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wireshark.org: https://www.wireshark.org/security/wnpa-sec-2026-86.html gitlab.com: https://gitlab.com/wireshark/wireshark/-/work_items/21467

Credits

Aisle Research (Dmitrijs Trizna, Luigino Camastra, Ze Sheng (O2Lab & TAMU), Igor Morgenstern)