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Vulnerability details: VCID-m2de-ys7x-6qdp
Vulnerability ID VCID-m2de-ys7x-6qdp
Aliases CVE-2026-5402
Summary TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-122 Heap-based Buffer Overflow
System Score Found at
cvssv3.1 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 8.8 https://gitlab.com/wireshark/wireshark/-/issues/21090
ssvc Track* https://gitlab.com/wireshark/wireshark/-/issues/21090
cvssv3.1 8.8 https://www.wireshark.org/security/wnpa-sec-2026-14.html
ssvc Track* https://www.wireshark.org/security/wnpa-sec-2026-14.html
Reference id Reference type URL
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5402
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
21090 https://gitlab.com/wireshark/wireshark/-/issues/21090
wnpa-sec-2026-14.html https://www.wireshark.org/security/wnpa-sec-2026-14.html
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://gitlab.com/wireshark/wireshark/-/issues/21090
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-04-30T12:51:10Z/ Found at https://gitlab.com/wireshark/wireshark/-/issues/21090
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.wireshark.org/security/wnpa-sec-2026-14.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-04-30T12:51:10Z/ Found at https://www.wireshark.org/security/wnpa-sec-2026-14.html

No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-04-30T15:46:49.732327+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/5xxx/CVE-2026-5402.json 38.5.0