CVE-2026-3439
Received Received - Intake

Stack-Based Buffer Overflow in SonicOS Certificate Handling Causes Firewall Crash

Publication date: 2026-03-04

Last updated on: 2026-03-05

Assigner: SonicWALL, Inc.

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

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Meta Information

Published
2026-03-04
Last Modified
2026-03-05
Generated
2026-07-06
AI Q&A
2026-03-04
EPSS Evaluated
2026-07-05
NVD
CVE-2026-3439
EUVD
EUVD-2026-9387

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
sonicwall sonicos to 7.3.2-7010 (exc)
sonicwall sonicos to 8.2.0-8009 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-121 A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

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Executive Summary

This vulnerability is a post-authentication stack-based buffer overflow in the SonicOS certificate handling component. It allows a remote attacker, who has already authenticated, to exploit the flaw to cause a crash of the firewall.

Impact Analysis

The vulnerability can impact you by allowing a remote attacker to crash your firewall, potentially causing a denial of service and disrupting network security and availability.

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