How severe is CVE-2026-3203?

CVE-2026-3203 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-3203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3203?

CVE-2026-3203 affects Wireshark. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3203?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3203 have an EU (EUVD) identifier?

Yes. CVE-2026-3203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8662.

When was CVE-2026-3203 published?

CVE-2026-3203 was published on 2026-02-25 and last updated on 2026-06-17.

CVE-2026-3203

CVE-2026-3203 is a medium-severity vulnerability in Wireshark with a CVSS 3.x base score of 5.5. 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-126.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8662
Weakness: CWE-126
Affected product: Wireshark
Published: 2026-02-25
Last modified: 2026-06-17

Description

RF4CE Profile protocol dissector crash in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 allows denial of service

Frequently asked questions

What is CVE-2026-3203?: RF4CE Profile protocol dissector crash in Wireshark 4.6.0 to 4.6.3 and 4.4.0 to 4.4.13 allows denial of service
How severe is CVE-2026-3203?: CVE-2026-3203 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-3203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3203?: CVE-2026-3203 affects Wireshark. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3203?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3203 have an EU (EUVD) identifier?: Yes. CVE-2026-3203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8662.
When was CVE-2026-3203 published?: CVE-2026-3203 was published on 2026-02-25 and last updated on 2026-06-17.

References

Affected products (1)

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

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