CVE-2026-0401
CVE-2026-0401 is a medium-severity vulnerability in Sonicwall Sonicos with a CVSS 3.x base score of 4.9. 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-476.
Key facts
- Severity: Medium (CVSS 3.x base score 4.9)
- EPSS exploit prediction: 0% (26th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-8523
- Weakness: CWE-476
- Affected product: Sonicwall Sonicos
- Published:
- Last modified:
Description
A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.
Frequently asked questions
- What is CVE-2026-0401?
- A post-authentication NULL Pointer Dereference vulnerability in SonicOS allows a remote attacker to crash a firewall.
- How severe is CVE-2026-0401?
- CVE-2026-0401 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-0401 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-0401?
- CVE-2026-0401 affects Sonicwall Sonicos. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-0401?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-0401 have an EU (EUVD) identifier?
- Yes. CVE-2026-0401 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8523.
- When was CVE-2026-0401 published?
- CVE-2026-0401 was published on 2026-02-24 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
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