Home/CVE/A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker
CVE

CVE-2026-3439

A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker

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

MEDIUM · CVSS 4.9 EPSS 0.00142
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-121Stack-based Buffer Overflow
▤

Affected Products & Versions

2
sonicwall sonicos< 7.3.2-7010
sonicwall sonicos< 8.2.0-8009
▣

Scoring & Timeline

4.9
MEDIUM · CVSS v3.1 · PSIRT@sonicwall.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD04 Mar 2026 · 10:16 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001Vendor Advisory
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