CVE-2025-40818: Siemens SINEMA Remote Connect Server · Incorrect Permissions
Affects Siemens SINEMA Remote Connect ServerSource CVE Database V5
Not known to be exploited · CVSS 3.3 Low · fixed in 3.2 : update Siemens SINEMA Remote Connect Server when convenient.
Data as of 26 Oct 2026, 08:30 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 0% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.2
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Siemens SINEMA Remote Connect Server | Affected
| Fixed in– |
AI-suggested
European organizations should immediately verify their SINEMA Remote Connect Server version and upgrade to version 3.2 SP4 or later once available. Until patched, organizations must enforce strict access controls to limit server access only to trusted administrators and authenticated users with a legitimate need. Implement robust monitoring and logging of server access to detect unauthorized attempts. Review and harden file system permissions on the server to ensure private keys are accessible only by the system processes and authorized administrators. Consider isolating the SINEMA Remote Connect Server in a segmented network zone with limited exposure. Employ multi-factor authentication for all users accessing the server to reduce risk of credential compromise. Regularly audit and rotate cryptographic keys and certificates to limit exposure duration. Finally, maintain up-to-date incident response plans to quickly address any signs of compromise related to this vulnerability.
Description
A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.2 SP4). Affected applications contain private SSL/TLS keys on the server that are not properly protected allowing any user with server access to read these keys. This could allow an authenticated attacker to impersonate the server potentially enabling man-in-the-middle, traffic decryption or unauthorized access to services that trust these certificates.