Vulnerability · Published Mar 4, 2026 · Assigned by sonicwall

CVE-2026-3439

Medium 4.9

In plain English

A medium-severity stack buffer overflow in SonicOS from SonicWall. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.3%top 79.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

Vendor	Product	Versions
SonicWall	SonicOS	7.0.1-5169 and older versions7.3.1-7013 and older versions8.1.0-8017 and older versions

Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0001 vendor-advisory