CVE entry · CVE-2026-19868
CVE-2026-19868: SonicWall SonicOS SSLVPN Use of Single-factor Authentication Vulnerability
SonicWall SonicOS SSLVPN contains a use of single-factor authentication vulnerability that may allow a user with valid credentials for an alternate authentication method to bypass SAML authentication controls. Successful exploitation may also bypass SAML-enforced multi-factor authentication (MFA).
- Actively exploited: added to CISA’s KEV catalog on November 6, 2026.
- Use by ransomware: not established so far.
- Remediation deadline for US federal agencies: November 20, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes SonicWall SonicOS SSLVPN, including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (psirt.global.sonicwall.com)
- NVD entry (NIST)
- CISA KEV catalog
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SonicWall SMA1000 Appliances OS Command Injection Vulnerability
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SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
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CVE-2026-15410Used by ransomwareSonicWall SMA1000 Appliances Code Injection Vulnerability
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CVE-2026-15409Used by ransomwareSonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability
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SonicWall SMA1000 Missing Authorization Vulnerability
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CVE-2024-40766Used by ransomwareSonicWall SonicOS Improper Access Control Vulnerability