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CVE-2025-40603VulnerabilityPublished

CVE-2025-40603: SonicWall SMA100 · Sensitive Data in Logs

Affects SonicWall SMA100Source CVE Database V5

0

Not known to be exploited · CVSS 4.5 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
4.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Oct 2025

  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: no evidence on record.

    Not in CISA KEV and no source reports exploitation

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

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

AI-suggested

European organizations using SonicWall SMA100 appliances should immediately restrict access to log files to only the most trusted and necessary administrators to minimize exposure. Implement strict role-based access controls (RBAC) and monitor administrative activities for unusual access patterns. Regularly audit log files to identify and remove sensitive information where possible. Until an official patch is released by SonicWall, consider disabling or limiting logging features that capture sensitive credential data if feasible without compromising operational visibility. Employ network segmentation to isolate management interfaces of SMA100 appliances from broader network access. Additionally, enforce strong authentication mechanisms such as multi-factor authentication (MFA) for all administrative access to reduce the risk of credential compromise. Stay informed on vendor updates and apply patches promptly once they become available. Finally, conduct user awareness training to ensure administrators understand the sensitivity of log data and the importance of secure handling.

Description

A potential exposure of sensitive information in log files in SonicWall SMA100 Series appliances may allow a remote, authenticated administrator, under certain conditions to view partial users credential data.

References

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