Multiple SonicWall Flaws Enable SQL Injection and Privilege Escalation Attacks

SonicWall has published a critical security advisory addressing four distinct vulnerabilities in its SMA1000 series appliances.

These security flaws open the door for attackers to escalate their system privileges, guess user credentials, and bypass essential multi-factor authentication protocols.

Administrators must prioritize patching these systems, as there are no temporary workarounds available to prevent potential exploitation.

The most severe of the patched issues is a privilege escalation vulnerability rooted in a SQL injection flaw.

When systems fail to properly neutralize special characters in SQL commands, attackers can manipulate backend databases.

In this specific case, an attacker who already possesses basic, read-only administrative access can exploit the flaw to gain full primary administrator control over the device.

This elevated access grants them total dominance over the appliance configuration and active user sessions.

Vulnerability Breakdown

The security advisory tracks four unique Common Vulnerabilities and Exposures (CVEs) discovered by independent security researchers.

• CVE-2026-4112 (CVSS 7.2) is a SQL injection flaw allowing read-only administrators to gain primary administrator privileges.
• CVE-2026-4113 (CVSS 5.3) is an observable response discrepancy that lets remote attackers systematically guess and enumerate SSL VPN user credentials.
• CVE-2026-4114 (CVSS 6.6) involves improper Unicode encoding handling, allowing an authenticated administrator to bypass AMC Time-based One-Time Password (TOTP) checks.
• CVE-2026-4116 (CVSS 6.0) also stems from improper Unicode handling and allows authenticated users to bypass Workplace and Connect Tunnel TOTP protections.

These vulnerabilities strictly affect the SMA1000 series hardware and virtual appliances. SonicWall has explicitly clarified that these issues do not impact the SSL-VPN services running on standard SonicWall firewalls.

Security teams should verify their hardware models before initiating emergency maintenance windows. Fortunately, the vendor reports no current evidence of active exploitation in the wild by threat actors.

Organizations running vulnerable firmware versions need to apply the provided hotfixes immediately. Vulnerable software includes the 12.4.3-03245 platform-hotfix and all earlier releases, as well as the 12.5.0-02283 platform-hotfix and earlier versions.

To secure their networks, administrators must log into the MySonicWall portal and download the appropriate fixed software. The recommended secure versions to install are platform-hotfix 12.4.3-03387 and platform-hotfix 12.5.0-02624 or higher.

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