How severe is CVE-2026-0959?

CVE-2026-0959 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-0959 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0959?

CVE-2026-0959 affects Wireshark. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-0959?

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

Does CVE-2026-0959 have an EU (EUVD) identifier?

Yes. CVE-2026-0959 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2431.

When was CVE-2026-0959 published?

CVE-2026-0959 was published on 2026-01-14 and last updated on 2026-06-17.

CVE-2026-0959

CVE-2026-0959 is a medium-severity vulnerability in Wireshark with a CVSS 3.x base score of 5.3. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (7th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2431
Weakness: CWE-787
Affected product: Wireshark
Published: 2026-01-14
Last modified: 2026-06-17

Description

IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.2 and 4.4.0 to 4.4.12 allows denial of service

Frequently asked questions

What is CVE-2026-0959?: IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.2 and 4.4.0 to 4.4.12 allows denial of service
How severe is CVE-2026-0959?: CVE-2026-0959 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-0959 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (7th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0959?: CVE-2026-0959 affects Wireshark. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-0959?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0959 have an EU (EUVD) identifier?: Yes. CVE-2026-0959 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2431.
When was CVE-2026-0959 published?: CVE-2026-0959 was published on 2026-01-14 and last updated on 2026-06-17.

References

Affected products (1)

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

More vulnerabilities in Wireshark

CVE-2011-0444 — Critical (CVSS 10.0): Buffer 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…
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CVE-2010-2994 — Critical (CVSS 10.0): Stack-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…
CVE-2009-1266 — Critical (CVSS 10.0): Unspecified vulnerability in Wireshark before 1.0.7 has unknown impact and attack vectors.
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