How severe is CVE-2026-5405?

CVE-2026-5405 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-5405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5405?

CVE-2026-5405 affects Wireshark. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5405?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-5405 have an EU (EUVD) identifier?

Yes. CVE-2026-5405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26462.

When was CVE-2026-5405 published?

CVE-2026-5405 was published on 2026-05-01 and last updated on 2026-06-30.

CVE-2026-5405

CVE-2026-5405 is a high-severity vulnerability in Wireshark with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26462
Weakness: CWE-122
Affected product: Wireshark
Published: 2026-05-01
Last modified: 2026-06-30

Description

RDP protocol dissector 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

Frequently asked questions

What is CVE-2026-5405?: RDP protocol dissector 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-2026-5405?: CVE-2026-5405 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-5405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5405?: CVE-2026-5405 affects Wireshark. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5405?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-5405 have an EU (EUVD) identifier?: Yes. CVE-2026-5405 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26462.
When was CVE-2026-5405 published?: CVE-2026-5405 was published on 2026-05-01 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*

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