CVE-2026-3439 - Vulnerability Details - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0003.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Sonicwall Subscribe	Sonicos Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Sonicwall Subscribe	Sonicos Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001

History

Wed, 04 Mar 2026 21:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Sonicwall Sonicwall sonicos
Vendors & Products		Sonicwall Sonicwall sonicos

Wed, 04 Mar 2026 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 04 Mar 2026 09:30:00 +0000

Type	Values Removed	Values Added
Description		A post-authentication Stack-based Buffer Overflow vulnerability in SonicOS certificate handling allows a remote attacker to crash a firewall.
Weaknesses		CWE-121
References		https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001

Projects

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MITRE

Status: PUBLISHED

Assigner: sonicwall

Published: 2026-03-04T09:19:45.392Z

Updated: 2026-03-04T16:05:54.854Z

Reserved: 2026-03-02T13:59:15.773Z

Link: CVE-2026-3439

Vulnrichment

Updated: 2026-03-04T16:04:59.052Z

NVD

Status : Awaiting Analysis

Published: 2026-03-04T10:16:08.150

Modified: 2026-03-04T18:08:05.730

Link: CVE-2026-3439

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-03-04T21:03:44Z

Weaknesses

CWE-121

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