CVE-20XX-?

CVE-2026-40539

7.1 HIGH 0.1% exploit odds No fix listed Crypto

What it is

An improper certificate validation vulnerability in Email API in Synology DiskStation Manager (DSM) before 7.2.1-69057-10, 7.2.2-72806-7 and 7.3.2-86009-2 allows man-in-the-middle attackers to read or write arbitrary files and conduct denial-of-service attacks.

At a glance

Exploitability
Can be exploited from the same network segment without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.
Exploit odds
0.1% chance of exploitation in the next 30 days (EPSS).
Fix
No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

  1. PublishedDisclosed publicly on CVE.org and NVD
  2. Last updatedMost recent change to the record

Details

Published
Last modified
Exploit probability
0.1% · EPSS, next 30 days
Weakness
CWE-295 · Improper certificate validation
Record status
Awaiting Analysis

Attack profile CVSS 3.1 · 7.1

Attack vector
Adjacent network
Complexity
High
Privileges needed
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Raw vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Meme: I wake up, CVE-2026-40539
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References

NVD record · CVE.org record