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PatchSiren cyber security CVE debrief

CVE-2026-0206 SonicWall CVE debrief

A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS allows a remote attacker to crash a firewall. This issue affects SonicWall SonicOS versions prior to 6.5.5.2-28n, 7.0.1-5169, 7.3.2-7010, and 8.2.0-8009. Defenders should assess exposure, prioritize remediation, and verify SonicOS versions. The vulnerability has a medium severity and defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Vendor
SonicWall
Product
SonicOS
CVSS
MEDIUM 4.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-29
Original CVE updated
2026-10-26
Advisory published
2026-04-29
Advisory updated
2026-10-26

Who should care

SonicOS administrators and security teams should assess exposure and prioritize remediation. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan vendor-supported updates or mitigations through normal change control where exposure is confirmed and monitor for potential attacks on vulnerable systems.

Why it matters

CVE-2026-0206 is a medium-severity vulnerability in SonicOS that allows remote attackers to crash firewalls. Defenders should assess exposure, prioritize remediation, and verify SonicOS versions.

  • Verify SonicOS versions to determine exposure
  • Remediate vulnerable versions to prevent potential attacks
  • Monitor for potential attacks on vulnerable systems

Technical summary

A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS allows a remote attacker to crash a firewall. The vulnerability affects SonicWall SonicOS versions prior to 6.5.5.2-28n, 7.0.1-5169, 7.3.2-7010, and 8.2.0-8009. This issue has a medium severity and defenders should verify SonicOS versions to determine exposure and prioritize remediation for vulnerable versions.

Defensive priority

Medium priority for SonicOS administrators to verify and update vulnerable versions.

Recommended defensive actions

  • Verify SonicOS versions and assess exposure
  • Prioritize remediation for vulnerable versions
  • Monitor for potential attacks

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability. A vendor advisory is available from SonicWall. The CVE record was published on 2026-04-29T17:16:40.633Z and has not been modified since then. The NVD entry is currently Analyzed. However, there may be additional information available from other sources that defenders should consider when assessing exposure and prioritizing remediation.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-0206 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-0206

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-0206 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0206

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.