How severe is CVE-2026-0206?

CVE-2026-0206 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-2026-0206 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0206?

CVE-2026-0206 affects Sonicwall Sonicos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-0206?

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

Does CVE-2026-0206 have an EU (EUVD) identifier?

Yes. CVE-2026-0206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26256.

When was CVE-2026-0206 published?

CVE-2026-0206 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-0206

CVE-2026-0206 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-121.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26256
Weakness: CWE-121
Affected product: Sonicwall Sonicos
Published: 2026-04-29
Last modified: 2026-06-17

Description

A post-authentication Stack-based Buffer Overflow vulnerabilities in SonicOS allows a remote attacker to crash a firewall.

Frequently asked questions

What is CVE-2026-0206?: A post-authentication Stack-based Buffer Overflow vulnerabilities in SonicOS allows a remote attacker to crash a firewall.
How severe is CVE-2026-0206?: CVE-2026-0206 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-2026-0206 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0206?: CVE-2026-0206 affects Sonicwall Sonicos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-0206?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-0206 have an EU (EUVD) identifier?: Yes. CVE-2026-0206 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26256.
When was CVE-2026-0206 published?: CVE-2026-0206 was published on 2026-04-29 and last updated on 2026-06-17.

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0004

Affected products (1)

cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*

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