# 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. CVE record · `CVE-2021-44693` - **Identifiers:** `CVE-2021-44693` - **State:** Confirmed - **Severity:** CVSS 4.9 Medium - **Critical:** No - **CNA:** siemens - **Weakness (CWE):** [CWE-1284](https://cwe.mitre.org/data/definitions/1284.html) - **Tags:** [CWE-1284](https://agentprime.io/advisories/tag/cwe-1284.md) - **Technologies:** [Siemens SIMATIC Drive Controller CPU 1504D TF](https://agentprime.io/advisories/technology/siemens-simatic-drive-controller-cpu-1504d-tf.md) · [Siemens SIMATIC Drive Controller CPU 1507D TF](https://agentprime.io/advisories/technology/siemens-simatic-drive-controller-cpu-1507d-tf.md) · [Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)](https://agentprime.io/advisories/technology/siemens-simatic-et-200sp-open-controller-cpu-1515sp-pc2-incl-siplus-variants.md) · [Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants)](https://agentprime.io/advisories/technology/siemens-simatic-s7-1200-cpu-family-incl-siplus-variants.md) · [Siemens SIMATIC S7-1500 CPU 1510SP F-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1510sp-f-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1510SP-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1510sp-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1511-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1511-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1511C-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1511c-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1511F-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1511f-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1511T-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1511t-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1511TF-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1511tf-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1512C-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1512c-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1512SP F-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1512sp-f-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1512SP-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1512sp-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1513-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1513-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1513F-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1513f-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1513R-1 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1513r-1-pn.md) · [Siemens SIMATIC S7-1500 CPU 1515-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1515-2-pn.md) · [Siemens SIMATIC S7-1500 CPU 1515F-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1515f-2-pn.md) · [Siemens SIMATIC S7-1500 CPU 1515R-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1515r-2-pn.md) - **Published:** 13 Dec 2022 - **Updated:** 21 Apr 2025 - **Reviewed by a person:** No Published by the CVE Program (CNA: siemens) at 13 Dec 2022, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Affected products, as the CNA wrote them - Vendor: Siemens. Product: SIMATIC Drive Controller CPU 1504D TF. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC Drive Controller CPU 1507D TF. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants). - affected: `All versions < V21.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1200 CPU family (incl. SIPLUS variants). - affected: `All versions < V4.6.0` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511C-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511C-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511T-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511TF-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512C-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512C-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513F-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513R-1 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515F-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515F-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515R-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515T-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1515TF-2 PN. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516-3 PN/DP. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516-3 PN/DP. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516F-3 PN/DP. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516F-3 PN/DP. - affected: `All versions < V2.9.7` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516T-3 PN/DP. - affected: `All versions < V3.0.1` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1516TF-3 PN/DP. - affected: `All versions < V3.0.1` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1517-3 PN/DP. - affected: `All versions < V3.0.1` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1517F-3 PN/DP. - affected: `All versions < V3.0.1` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1517H-3 PN. - affected: `All versions < V3.0.1` - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1517T-3 PN/DP. - affected: `All versions < V3.0.1` - Other versions: unknown And 69 more products. The full list is on the CVE record: ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 4.9 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C`, from CNA (siemens) - **CISA KEV:** Not listed. - **EPSS:** 0.0077, the 55th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline This record came from the full history of the CVE Program, published 13 Dec 2022. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2021-44693](https://www.cve.org/CVERecord?id=CVE-2021-44693) - [NVD: CVE-2021-44693](https://nvd.nist.gov/vuln/detail/CVE-2021-44693) ### References from the CNA - Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .