CVE-2026-5402 — HIGH (8.8) — White Hats Nepal

Q: What is CVE-2026-5402?

CVE-2026-5402 is a vulnerability with a CVSS score of 8.8 (HIGH). TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

Q: How severe is CVE-2026-5402?

CVE-2026-5402 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-5402?

Check the references section above for vendor advisories and patch information. Affected products include: Wireshark Wireshark.

Vulnerability Description

TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

CVSS Score

8.8

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Wireshark	Wireshark	>= 4.6.0, <= 4.6.4

Related Weaknesses (CWE)

CWE-122

References

https://gitlab.com/wireshark/wireshark/-/issues/21090ExploitIssue Tracking
https://www.wireshark.org/security/wnpa-sec-2026-14.htmlVendor Advisory

FAQ

What is CVE-2026-5402?

CVE-2026-5402 is a vulnerability with a CVSS score of 8.8 (HIGH). TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

How severe is CVE-2026-5402?

CVE-2026-5402 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5402?

Check the references section above for vendor advisories and patch information. Affected products include: Wireshark Wireshark.