CVE-2024-40766: SonicWall SonicOS · Improper Access Control
Affects SonicWall SonicOSSource CVE Database V5
Exploited in the wild · used in ransomware campaigns · KEV due 30 Sep 2024 · 18% EPSS : apply the vendor's fix or mitigations to SonicWall SonicOS now.
Data as of 26 Oct 2026, 15:59 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- Ransomware
- Used in ransomware campaigns
- EPSS
- 18.3% chance of exploitation in 30 days – higher than 97% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- CISA SSVC
- Exploitation
- Reliable evidence of use in the wild by real attackers
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2024-09-09.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:LExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 23 Aug 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 17 days after disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by SonicWall, Inc.
, 44 days before disclosure
CVE published
on cve.org
, t = 0
CISA SSVC assessment
exploitation active
, 17 days after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed · ransomware use known
, 17 days after disclosure
KEV remediation due
US federal deadline
, 38 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| SonicWallSonicOS | Affected
| Fixed in– |
Check the firmware or software version for SonicWall SonicOS in the device's admin interface against the vendor advisory.
Description
An improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash. This issue affects SonicWall Firewall Gen 5 and Gen 6 devices, as well as Gen 7 devices running SonicOS 7.0.1-5035 and older versions.