CVE-2020-15783
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and...
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
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
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
- Record
CVE-2020-15783- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
- Record
CVE-2020-15783- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
EUVDEUVD-2020-7766
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
- Record
EUVD-2020-7766- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-h3cm-r647-2vf6
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and...
A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
- Record
GHSA-h3cm-r647-2vf6- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
Affected products
- siemens simatic s7-300 cpu family (incl. related et200 cpus and siplus variants)
- siemens simatic tdc cpu555
- siemens sinumerik 840d sl
- siemens simatic s7-300 cpu 312 firmware
- siemens simatic s7-300 cpu 314 firmware
- siemens simatic s7-300 cpu 315-2 dp firmware
- siemens simatic s7-300 cpu 315-2 pn firmware
- siemens simatic s7-300 cpu 315f-2 dp firmware
- siemens simatic s7-300 cpu 315f-2 pn firmware
- siemens simatic s7-300 cpu 317-2 dp firmware
- siemens simatic s7-300 cpu 317-2 pn firmware
- siemens simatic s7-300 cpu 317f-2 dp firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-15783 is a high vulnerability (CVSS 7.5) in Siemens Simatic S7-300 Cpu Family (incl. Related Et200 Cpus And Siplus Variants), published November 12, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.65%, the 76th percentile. No source names a fixed version.