Assessment
Why it matters
EPSS is 0.2%; technical severity is CVSS 4.8.
A stored Cross-Site Scripting (XSS) vulnerability has been identified in the SonicWall Email Security appliance due to improper neutralization of user-supplied input during web page generation, allowing a remote authenticated attacker as admin user to potentially execute arbitrary JavaScript code.
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:R/S:C/C:L/I:L/A:N
- CWE
- CWE-79
- 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
- Required
Signal timeline
- CVE published
- Latest EPSS score: 0.2%
- Signal calculated at 9