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Vulnerability record · CVE-2026-5402 · published 30 April 2026

CVE-2026-5402: Wireshark heap-based buffer overflow vulnerability

Wireshark · Wireshark

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

8.8 CVSS 3.1 High EPSS 0.65% · top 50.7% CWE-122 · Heap-based buffer overflow
8.8CVSS 3.1 base score
0.65%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
15 Jul 2026Last modified by NVD

Description

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gitlab.com/wireshark/wireshark/-/issues/21090 ExploitIssue Tracking
https://www.wireshark.org/security/wnpa-sec-2026-14.html Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-5402
https://bugzilla.redhat.com/show_bug.cgi?id=2464038
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5402.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-0444Wireshark memory buffer overflow vulnerabilityBuffer overflow in the MAC-LTE dissector (epan/dissectors/packet-mac-lte.c) in Wireshark 1.2.0 through 1.2.13 and 1.4.0 through 1.4.2 allows remote a…EPSS 7.2%10.0CVE-2010-2994Wireshark memory buffer overflow vulnerabilityStack-based buffer overflow in the ASN.1 BER dissector in Wireshark 0.10.13 through 1.0.14 and 1.2.0 through 1.2.9 has unknown impact and remote atta…EPSS 2.4%10.0CVE-2010-2995Wireshark vulnerabilityThe SigComp Universal Decompressor Virtual Machine (UDVM) in Wireshark 0.10.8 through 1.0.14 and 1.2.0 through 1.2.9 allows remote attackers to cause…EPSS 6.7%10.0CVE-2009-1266Wireshark vulnerabilityUnspecified vulnerability in Wireshark before 1.0.7 has unknown impact and attack vectors.EPSS 1.6%10.0CVE-2009-1210Wireshark vulnerabilityFormat string vulnerability in the PROFINET/DCP (PN-DCP) dissector in Wireshark 1.0.6 and earlier allows remote attackers to execute arbitrary code v…EPSS 15%10.0CVE-2008-3146Wireshark memory buffer overflow vulnerabilityMultiple buffer overflows in packet_ncp2222.inc in Wireshark (formerly Ethereal) 0.9.7 through 1.0.2 allow attackers to cause a denial of service (ap…EPSS 4.0%10.0CVE-2007-6112Wireshark memory buffer overflow vulnerabilityBuffer overflow in the PPP dissector Wireshark (formerly Ethereal) 0.99.6 allows remote attackers to cause a denial of service (crash) and possibly e…EPSS 6.2%10.0CVE-2007-6114Wireshark memory buffer overflow vulnerabilityMultiple buffer overflows in Wireshark (formerly Ethereal) 0.99.0 through 0.99.6 allow remote attackers to cause a denial of service (crash) and poss…EPSS 6.2%

Source: NIST National Vulnerability Database (record CVE-2026-5402), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.