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CVE-2026-5403

Wireshark buffer overflow

7.8 HIGHPublic exploitEPSS 0.19%
  1. Published30 Apr 2026

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 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Wireshark≥ 4.4.0 < 4.4.15 · ≥ 4.6.0 < 4.6.5

Remediation

Fixed in
Wireshark≥ 4.4.15

References

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Frequently asked

Is CVE-2026-5403 being actively exploited?

CVE-2026-5403 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.19%.

How severe is CVE-2026-5403?

CVE-2026-5403 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 0.19% probability of exploitation.

Which products are affected by CVE-2026-5403?

Affected products include Wireshark.

How do I fix CVE-2026-5403?

Upgrade affected software to a fixed version, for example Wireshark 4.4.15 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-5403 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.