CVE-2018-7844
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon...
CVE-2018-7844 is a high vulnerability (CVSS 7.5) in Schneider-electric Modicon M340 Firmware, published May 22, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.85%, the 86th percentile. No source names a fixed version.
- Severity
- 7.5 HighCVSS 3.1, NVD
- Exploit chance
- 2.85%EPSS, 86th percentile
- Exploitation
- None known1 public exploit
- Fixed in
- No fix listedNo source names one
Description
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause the disclosure of SNMP information when reading memory blocks from the controller over Modbus.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | yanissec/CVE-2018-7844 | 2023-10-20 |
What each source reports
NVD Score used
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause the disclosure of SNMP information when reading memory blocks from the controller over Modbus.
- Record
CVE-2018-7844- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE ListNo score
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause the disclosure of SNMP information when reading memory blocks from the controller over Modbus.
- Record
CVE-2018-7844- Updated
- 2026-11-02
EUVDEUVD-2018-19556No score
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause the disclosure of SNMP information when reading memory blocks from the controller over Modbus.
- Record
EUVD-2018-19556- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6xrh-xrwx-jp62No score
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon...
A CWE-200: Information Exposure vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause the disclosure of SNMP information when reading memory blocks from the controller over Modbus.
- Record
GHSA-6xrh-xrwx-jp62- Weakness
- CWE-200
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.