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MEDIUM · 4.9

CVE-2026-3439

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

Vulnerability Description

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

CVSS Score

4.9

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
SonicwallSonicos< 7.3.2-7010
SonicwallNsa 2700-
SonicwallNsa 3700-
SonicwallNsa 4700-
SonicwallNsa 5700-
SonicwallNsa 6700-
SonicwallNssp 10700-
SonicwallNssp 11700-
SonicwallNssp 13700-
SonicwallNssp 15700-
SonicwallNsv270-
SonicwallNsv470-
SonicwallNsv870-
SonicwallTz270-
SonicwallTz270W-
SonicwallTz370-
SonicwallTz370W-
SonicwallTz470-
SonicwallTz470W-
SonicwallTz570-

Related Weaknesses (CWE)

CWE-121

References

FAQ

What is CVE-2026-3439?

CVE-2026-3439 is a vulnerability with a CVSS score of 4.9 (MEDIUM). A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker to crash a firewall.

How severe is CVE-2026-3439?

CVE-2026-3439 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3439?

Check the references section above for vendor advisories and patch information. Affected products include: Sonicwall Sonicos, Sonicwall Nsa 2700, Sonicwall Nsa 3700, Sonicwall Nsa 4700, Sonicwall Nsa 5700.