CVE-2021-37205
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.4),...
A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.
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
CVE List Score used
A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.
- Record
CVE-2021-37205- 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/E:P/RL:O/RC:C - Weakness
- CWE-401
- Updated
- 2026-11-02
EUVDEUVD-2021-23779
A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.
- Record
EUVD-2021-23779- 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/E:P/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-78f8-w6wx-97fh
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.4),...
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions), SIMATIC S7-PLCSIM Advanced (All versions), TIM 1531 IRC (incl. SIPLUS NET variants) (All versions >= V2.2). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.
- Record
GHSA-78f8-w6wx-97fh- 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-401
- Updated
- 2026-11-02
NVD
A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.
- Record
CVE-2021-37205- 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
- 7.1 High
AV:N/AC:M/Au:N/C:N/I:N/A:C - Weakness
- CWE-401
- Updated
- 2026-11-02
Affected products
- siemens simatic drive controller family
- siemens simatic et 200sp open controller cpu 1515sp pc2 (incl. siplus variants)
- siemens simatic s7-1200 cpu family (incl. siplus variants)
- siemens simatic s7-1500 cpu family (incl. related et200 cpus and siplus variants)
- siemens simatic s7-1500 software controller
- siemens simatic s7-plcsim advanced
- siemens siplus tim 1531 irc
- siemens tim 1531 irc
- siemens simatic drive controller cpu 1504d tf firmware
- siemens simatic drive controller cpu 1507d tf firmware
- siemens simatic et 200sp open controller cpu 1515sp pc2 firmware
- siemens simatic s7-1200 cpu 1211c firmware
Show 43 moreShow less
- siemens simatic s7-1200 cpu 1212c firmware
- siemens simatic s7-1200 cpu 1212fc firmware
- siemens simatic s7-1200 cpu 1214c firmware
- siemens simatic s7-1200 cpu 1214fc firmware
- siemens simatic s7-1200 cpu 1215c firmware
- siemens simatic s7-1200 cpu 1215fc firmware
- siemens simatic s7-1200 cpu 1217c firmware
- siemens simatic s7-1500 cpu 1510sp-1 firmware
- siemens simatic s7-1500 cpu 1510sp firmware
- siemens simatic s7-1500 cpu 1511-1 firmware
- siemens simatic s7-1500 cpu 1511c-1 firmware
- siemens simatic s7-1500 cpu 1511f-1 firmware
- siemens simatic s7-1500 cpu 1511t-1 firmware
- siemens simatic s7-1500 cpu 1511tf-1 firmware
- siemens simatic s7-1500 cpu 1512c-1 firmware
- siemens simatic s7-1500 cpu 1512sp-1 firmware
- siemens simatic s7-1500 cpu 1512spf-1 firmware
- siemens simatic s7-1500 cpu 1513-1 firmware
- siemens simatic s7-1500 cpu 1513f-1 firmware
- siemens simatic s7-1500 cpu 1513r-1 firmware
- siemens simatic s7-1500 cpu 1515-2 firmware
- siemens simatic s7-1500 cpu 1515f-2 firmware
- siemens simatic s7-1500 cpu 1515r-2 firmware
- siemens simatic s7-1500 cpu 1515t-2 firmware
- siemens simatic s7-1500 cpu 1515tf-2 firmware
- siemens simatic s7-1500 cpu 1516-3 firmware
- siemens simatic s7-1500 cpu 1516f-3 firmware
- siemens simatic s7-1500 cpu 1516pro-2 firmware
- siemens simatic s7-1500 cpu 1516pro f firmware
- siemens simatic s7-1500 cpu 1516t-3 firmware
- siemens simatic s7-1500 cpu 1516tf-3 firmware
- siemens simatic s7-1500 cpu 1517-3 firmware
- siemens simatic s7-1500 cpu 1517f-3 firmware
- siemens simatic s7-1500 cpu 1517tf-3 firmware
- siemens simatic s7-1500 cpu 1518-4 firmware
- siemens simatic s7-1500 cpu 1518f-4 firmware
- siemens simatic s7-1500 cpu 1518hf-4 firmware
- siemens simatic s7-1500 cpu 1518t-4 firmware
- siemens simatic s7-1500 cpu 1518tf-4 firmware
- siemens simatic s7-1500 cpu cpu 1513pro-2 firmware
- siemens simatic s7-1500 cpu cpu 1513prof-2 firmware
- siemens simatic s7-plcsim advanced firmware
- siemens tim 1531 irc firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-37205 is a high vulnerability (CVSS 7.5) in Siemens Simatic Drive Controller Family, published February 9, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.64%, the 76th percentile. No source names a fixed version.