CVE-2017-2684
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a...
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.
- Record
CVE-2017-2684- CVSS 3.0
- 9.0 Critical
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-592
- Updated
- 2026-11-02
CVE List No score
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.
- Record
CVE-2017-2684- Weakness
- CWE-592
- Updated
- 2026-11-02
EUVDEUVD-2017-11827 No score
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.
- Record
EUVD-2017-11827- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h5v3-4rh5-mj9g
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a...
Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level authentication.
- Record
GHSA-h5v3-4rh5-mj9g- CVSS 3.0
- 9.0 Critical
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-2684 is a critical vulnerability (CVSS 9.0) in Siemens Simatic Logon, published February 22, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.99%, the 80th percentile. No source names a fixed version.