# CVE-2026-3469: SonicWall Email Security denial of service via improper input validation

Source: https://junglewise.ai/threats/cve-2026-3469-sonicwall-email-security-denial-of-service-via-improper-input  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-31. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-3469 · Severity: low · CVSS 2.7 · Published 2026-03-31

A security flaw in the SonicWall Email Security appliance could allow an authorized administrator to inadvertently or intentionally crash the system. This appliance is used to protect corporate email from threats like spam and phishing. If exploited, the email security service would become unresponsive, potentially disrupting email flow or management capabilities.

Technologies: [SonicWall Email Security](https://junglewise.ai/threats/technologies/email-security), [SonicWall Esa5000](https://junglewise.ai/threats/technologies/esa5000), [SonicWall Esa5050](https://junglewise.ai/threats/technologies/esa5050), [SonicWall Esa7000](https://junglewise.ai/threats/technologies/esa7000), [SonicWall Esa7050](https://junglewise.ai/threats/technologies/esa7050), [SonicWall Esa9000](https://junglewise.ai/threats/technologies/esa9000). Vendors: [SonicWall](https://junglewise.ai/threats/vendors/sonicwall).

## Quick answers

**Is CVE-2026-3469 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3469 being exploited in the wild.

**How severe is CVE-2026-3469?** Low severity, with a CVSS score of 2.7, published 31 March 2026.

**Which products and versions are affected?** SonicWall Email Security 10.0.34.8215 and earlier, 10.0.34.8223 and earlier.

**Is there a fix for CVE-2026-3469?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-3469 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-3469?** Check whether you run SonicWall Email Security, SonicWall Esa5000, SonicWall Esa5050 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An improper input validation vulnerability (CWE-20) exists in the SonicWall Email Security appliance. A remote attacker with high-level administrative privileges can provide specially crafted input that the system fails to process correctly, leading to a denial-of-service (DoS) condition where the application becomes unresponsive. The attack is carried out over the network but requires valid administrative credentials (PR:H). The vulnerability affects versions 10.0.34.8215, 10.0.34.8223, and earlier.

## Affected products

- SonicWall Email Security 10.0.34.8215 and earlier, 10.0.34.8223 and earlier

## Timeline

- 2026-03-31: disclosed
- 2026-03-31: advisory: SonicWall PSIRT published SNWLID-2026-0002

## References

- [https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0002](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2026-0002)

## Related threats

- [SonicWall Email Security database corruption via improper input sanitization](https://junglewise.ai/threats/cve-2026-3470-sonicwall-email-security-database-corruption-via-improper-input)
- [SonicWall Email Security stored XSS](https://junglewise.ai/threats/cve-2026-3468-sonicwall-email-security-stored-xss)