How serious is CVE-2026-3439?

This vulnerability has a CVSS score of 4.9 out of 10, classified as MEDIUM severity. Proof-of-concept exploit code is publicly available, making this an active threat.

Is there exploit code available for CVE-2026-3439?

Yes, proof-of-concept exploit code for CVE-2026-3439 is publicly available on GitHub and security research platforms. This increases the risk of active exploitation.

Which products are affected by CVE-2026-3439?

CVE-2026-3439 affects sonicwall sonicos. Check the full CVE details for specific version information.

How do I fix CVE-2026-3439?

To remediate CVE-2026-3439, check for security patches from sonicwall. Apply all available updates and security patches. If no patch is available, implement recommended workarounds or security controls to mitigate the risk.

CVE-2026-3439

Medium

|4.9

Exploit Available

Plain English Summary

AI-powered analysis for quick understanding

This vulnerability allows a remote attacker to crash a SonicWall firewall, potentially disrupting network security and access. It requires the attacker to be authenticated, meaning they need valid credentials to exploit the flaw.

Technical Description

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

CVSS Vector Analysis

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

Confidentiality ImpactNone

Integrity ImpactNone

Availability ImpactHigh

ScopeUnchanged

Vector String

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploit Resources

Search for proof-of-concept code and exploit modules

GitHub Search Exploit-DB Nuclei Templates Metasploit Vulners

Official References

NIST NVD

Est. Bounty

$655($500-$1K)

Vendor Response

Grade APatched in 1 day

Quick Information

Published

Mar 4, 2026

about 1 month ago

Last Modified

Mar 5, 2026

about 1 month ago

Vendor

sonicwall

Product

sonicos