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VulnerabilityPublished Updated

CVE-2024-40766: SonicWall SonicOS · Improper Access Control

Affects SonicWall SonicOSSource CVE Database V5

0

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

CVSS 3.1 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
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:L

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

  1. Disclosed: evidence found.

    CVE published 23 Aug 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: evidence found.

    Listed in CISA KEV 17 days after disclosure

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

Timeline

  1. CVE ID reserved

    by SonicWall, Inc.

    , 44 days before disclosure

  2. CVE published

    on cve.org

    , t = 0

  3. CISA SSVC assessment

    exploitation active

    , 17 days after disclosure

  4. Added to CISA KEV (opens in a new tab)

    exploitation confirmed · ransomware use known

    , 17 days after disclosure

  5. 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

Affected software

ProductAffectedFixed in
SonicWallSonicOSAffected
  • =5.9.2.14-12o and older versions
  • =6.5.4.14-109n and older versions
  • =7.0.1-5035 and older versions
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.

Reports on CVE-2024-40766

References

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