synced 9 MIN AGO
01 Record

CVE-2021-44694

Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

MediumPUBLISHEDCNA: siemens
CNA base score5.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H/E:P/RL:O/RC:C

02 Description

Affected devices don't process correctly certain special crafted packets sent to port 102/tcp, which could allow an attacker to cause a denial of service in the device.

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.65% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 51.3% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-12-13 00:00Z3 YR AGO
Last updated
2025-04-21 13:45Z1 YR AGO
Reserved
2021-12-07
Assigning CNA
siemens
Record state
PUBLISHED
Severity
Medium (CVSS 5.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H/E:P/RL:O/RC:C
Weaknesses
  • CWE-1287Improper Validation of Specified Type of InputBase
  • CWE-20Improper Input ValidationClass
Data version
5.1
Document digest
963ea90842b93932334bd3a133312cfcc9ffe66adecb7eadda07a66bf3339661

05 Affected products

VendorProductVersionsPlatforms
SiemensSIMATIC Drive Controller CPU 1504D TFAll versions < V2.9.7—
SiemensSIMATIC Drive Controller CPU 1507D TFAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1510SP F-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1510SP-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1511-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1511C-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1511F-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1511T-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1511TF-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1512C-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1512SP F-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1512SP-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1513-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1513F-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1513R-1 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1515-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1515F-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1515R-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1515T-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1515TF-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1516-3 PN/DPAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1516F-3 PN/DPAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU 1516T-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1516TF-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1517-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1517F-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1517H-3 PNAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1517T-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1517TF-3 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518-4 PN/DP MFPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518F-4 PN/DP MFPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518HF-4 PNAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518T-4 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU 1518TF-4 PN/DPAll versions < V3.0.1—
SiemensSIMATIC S7-1500 CPU S7-1518-4 PN/DP ODKAll versions < V2.9.7—
SiemensSIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODKAll versions < V2.9.7—
SiemensSIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PNAll versions < V2.9.7—
SiemensSIMATIC S7-1500 Software Controller V2All versions < V21.9.7—
SiemensSIMATIC S7-PLCSIM AdvancedAll versions < V5.0—
SiemensSIPLUS ET 200SP CPU 1510SP F-1 PNAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1510SP F-1 PN RAILAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1510SP-1 PNAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1510SP-1 PN RAILAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1512SP F-1 PNAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1512SP F-1 PN RAILAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1512SP-1 PNAll versions < V2.9.7—
SiemensSIPLUS ET 200SP CPU 1512SP-1 PN RAILAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1511-1 PNAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1511-1 PN T1 RAILAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1511-1 PN TX RAILAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1511F-1 PNAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1513-1 PNAll versions < V2.9.7—
SiemensSIPLUS S7-1500 CPU 1513F-1 PNAll versions < V2.9.7—

17 further entries not shown. The complete list is in the raw JSON document.

06 References