Assessment
Why it matters
EPSS is 0.4%; technical severity is CVSS 2.7.
A denial-of-service (DoS) vulnerability exists due to improper input validation in the SonicWall Email Security appliance, allowing a remote authenticated attacker as admin user to cause the application to become unresponsive.
Who should care
- Teams operating Email Security
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Email Security is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- SonicWall Security advisory SNWLID 2026 0002
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
- CWE
- CWE-20
- Affected versions
- SonicWall Email Security (End Excluding 10.0.35.8405)
- Fixed versions
- SonicWall Email Security (Fixed from 10.0.35.8405)
- Published
- 31 March 2026
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
Signal timeline
- CVE published
- Latest EPSS score: 0.4%
- Signal calculated at 7