How to Fix CVE-2026-0206: SonicOS (Bundle Sibling)
By Sai Kiran Pandrala
Last verified: 2026-05-25
CVE-2026-0206 is a sibling vulnerability in the same vendor advisory as CVE-2026-0204. Applying the patched build named in the primary write-up closes this CVE as well.
| Severity | CVSS 4.9 - Medium |
|---|---|
| Actively exploited? | Not currently in CISA KEV |
| Affected | Same as the bundle - see CVE-2026-0204 |
| Fixed in | Same patched build as CVE-2026-0204 (See vendor advisory) |
| Type (CWE) | CWE-121: CWE-121 Stack-based buffer overflow |
What's different about CVE-2026-0206?
A post-authentication Stack-based Buffer Overflow vulnerabilities in SonicOS allows a remote attacker to crash a firewall.
The technical impact and remediation are identical to the primary CVE in the bundle. The same vendor patch closes both.
How to fix CVE-2026-0206
Apply the patched build per the primary write-up: How to Fix CVE-2026-0204.
The patch installation procedure, verification commands, and interim mitigations are documented there. Reusing one runbook keeps the rollout consistent across the bundle.
Frequently asked questions
Is CVE-2026-0206 fixed by the same patch as CVE-2026-0204?
Yes. CVE-2026-0206 ships in the same vendor advisory as CVE-2026-0204. Applying the patched build named in the primary write-up closes both.
What is the CVSS score for CVE-2026-0206?
The CVSS base score is 4.9 (Medium).
Is it being exploited?
It is not currently listed in CISA KEV.
References
- Official vendor advisory: https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0004
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-0206
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-0204
*Part of the SonicOS bundle. Full procedure at CVE-2026-0204.*