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VulnerabilityPublished

CVE-2025-13052: ASUSTOR ADM · Improper Certificate Validation

Affects ASUSTOR ADMSource CVE Database V5

0

Not known to be exploited · CVSS 7.0 High.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Dec 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
ASUSTOR ADMAffected
  • =4.1.0
  • =5.0.0
Fixed in–

AI-suggested

  1. Immediately review and disable SMTP email notifications configured via msmtp on ASUSTOR ADM devices until a vendor patch is available.
  2. Monitor ASUSTOR’s official channels for security updates and apply patches promptly once released.
  3. If SMTP notifications are essential, configure msmtp or alternative SMTP clients to enforce strict TLS/SSL certificate validation, including certificate pinning or use of trusted CA bundles.
  4. Employ network segmentation to isolate NAS devices from untrusted networks and restrict access to SMTP servers to trusted hosts only.
  5. Use VPNs or encrypted tunnels (e.g., SSH tunnels or IPsec) to protect SMTP traffic from interception on internal or transit networks.
  6. Audit and rotate SMTP credentials regularly to reduce the impact of potential credential compromise.
  7. Implement network intrusion detection systems (NIDS) to detect anomalous MITM or TLS interception activities.
  8. Educate administrators on the risks of improper certificate validation and encourage secure configuration practices.
  9. Consider alternative notification mechanisms that do not rely on SMTP or msmtp until the vulnerability is resolved.
  10. Maintain comprehensive logging and monitoring of ADM device activities to detect suspicious access or configuration changes.

Description

When the user set the Notification's sender to send emails to the SMTP server via msmtp, an improper validated TLS/SSL certificates allows an attacker who can intercept network traffic between the SMTP client and server to execute a man-in-the-middle (MITM) attack, which may obtain the sensitive information of the SMTP. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RKD2 as well as from ADM 5.0.0 through ADM 5.1.0.RN42.

References

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