Vulnerability in SonicWall (September 10, 2024)
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
On August 22, 2024, Sonicwall released a patch for the critical vulnerability CVE-2024-40766 affecting Sonicwall generation 5, 6, and 7 firewalls. This vulnerability, of the type access control failure, allows an attacker to cause a remote denial of service, a breach of...
CSIRTS triage
- What
- A critical vulnerability in SonicWall generation 5, 6, and 7 firewalls allows an attacker to cause a remote denial of service.
- Who is affected
- Deployments of SonicWall generation 5, 6, and 7 firewalls are affected.
- Urgency
- Remediation is urgent due to active exploitation and unknown severity.
- Action
- Apply the patch released on August 22, 2024.
AI-assisted analysis generated from the source advisory — verify against the original.
Details
Original advisory: https://www.cert.ssi.gouv.fr/alerte/CERTFR-2024-ALE-011/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2024-40766Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-40766 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownexploitedSecurity incidents in SonicWall firewalls (August 5, 2025)cert-fr-alerte
- criticalexploitedCVE-2024-40766: SonicWall SonicOS Improper Access Control Vulnerabilitycisa-kev
Recent advisories for SonicWall
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- unknownCVE-2026-66153: The NEService auto-upgrade process insecurely handles temporary files in SonicWall NetExtender…nvd · 2026-08-25
- unknownCVE-2026-66152: A Path traversal vulnerability in OPSWAT tarball in the SonicWall NetExtender Linux client all…nvd · 2026-08-25
- medium[NEW] [medium] SonicWall Email Security: Multiple Vulnerabilities Enable Execution of Arbitrary Code with Admi…cert-bund · 2026-08-17
- unknownSonicWall security advisory (AV26-809)cccs · 2026-08-12
- high[NEW] [high] SonicWall GMS: Multiple Vulnerabilitiescert-bund · 2026-08-12
- unknownMultiple vulnerabilities in SonicWall products (August 12, 2026)cert-fr-avis · 2026-08-12
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