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CVE-2026-0204 is a high-severity improper access control vulnerability in SonicOS affecting SonicWall Gen 6, Gen 7, and Gen 8 hardware firewalls, as well as affected Gen 7 NSv virtual appliances. SonicWall describes the issue as a flaw in the SonicOS access control mechanism that may allow certain management interface functions to become accessible under specific conditions. Supporting reporting further characterizes the issue as involving missing or weak authentication around critical management-plane functionality, with references to CWE-306 and CWE-1390. The vulnerability affects SonicOS 6.5.5.1-6n and earlier on Gen 6, 7.0.1-5169 and earlier and 7.3.1-7013 and earlier on Gen 7/NSv, and 8.1.0-8017 and earlier on Gen 8.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity SonicWall SonicOS vulnerability affecting Gen 6, Gen 7, and Gen 8 firewall platforms that could allow an attacker with access to the management interface to alter configurations and disable protections.
An improper access control vulnerability in SonicOS that may allow certain management interface functions to be accessible under specific conditions.
An improper access control vulnerability in SonicWall SonicOS that can allow attackers to access certain management interface functions under specific conditions due to weak authentication.
An authentication and access control vulnerability in SonicOS management interface functions that can allow an adjacent attacker without credentials to gain unauthorized access and potentially full control of affected SonicWall firewalls.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.