CVE-2026-5403 — HIGH (7.8) — White Hats Nepal

Q: What is CVE-2026-5403?

CVE-2026-5403 is a vulnerability with a CVSS score of 7.8 (HIGH). SBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution

Q: How severe is CVE-2026-5403?

CVE-2026-5403 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-5403?

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

Vulnerability Description

SBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution

CVSS Score

7.8

HIGH

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Wireshark	Wireshark	>= 4.4.0, < 4.4.15

Related Weaknesses (CWE)

CWE-122 CWE-787

References

https://gitlab.com/wireshark/wireshark/-/issues/21103ExploitIssue TrackingThird Party Advisory
https://www.wireshark.org/security/wnpa-sec-2026-16.htmlVendor Advisory

FAQ

What is CVE-2026-5403?

CVE-2026-5403 is a vulnerability with a CVSS score of 7.8 (HIGH). SBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution

How severe is CVE-2026-5403?

CVE-2026-5403 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-5403?

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