9.8

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

CVSS: 9.8v3.1CriticalKEVRansomwareAnalyzed
Published 23-08-2024Last modified 21-09-2026
Open JSON

Vulnerability summary

CVE-2024-40766 is a critical (CVSS 9.8) Improper Access Control vulnerability in SonicWall SonicOS. It is known to be exploited: CISA lists it, first on 09-09-2024. It has been used in ransomware campaigns. EPSS estimates a 18.38% chance of exploitation in the next 30 days, higher than 97.2% of scored vulnerabilities.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
18.38%
0%100%
Medium · +0.20 pp in 30 days
KEVListedCISA
RansomwareKnown useFlagged by CISA
Public exploits0No public exploits recorded

Timeline

  1. 23-08-2024
    PublishedVulnerability first disclosed.
  2. 09-09-2024
    Added to CISA KEVSonicWall SonicOS Improper Access Control Vulnerability
  3. 30-09-2024
    CISA remediation dueApply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
  4. 21-09-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

18.38%

Chance of exploitation in the next 30 days

Percentile

97%

Versus all other CVEs

30-day change

+0.20 pp

From 18.18% on 19-09-2026

19-09-202619-10-2026
EPSS score
18.38%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
09-09-2024
Federal due date
30-09-2024
Ransomware

CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0015 www.sonicwall.com/support/… nvd.nist.gov/vuln/detail/CVE-2024-40766

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Sonicwall1 product
  • sonicos5.9.2.14-12o and older versions | 6.5.4.14-109n and older versions | 7.0.1-5035 and older versions | < 5.9.2.14-13o | < 6.5.2.8-2n | < 6.5.4.15.116n | ≤ 7.0.1-5035

1 vendor · 1 product

References

2 links