# Use after free in Siemens SIMATIC Drive Controller CPU 1504D TF and others CVE record · `CVE-2023-46156` - **Identifiers:** `CVE-2023-46156` - **State:** Confirmed - **Severity:** CVSS 7.5 High - **Critical:** No - **CNA:** siemens - **Weakness (CWE):** [CWE-416](https://cwe.mitre.org/data/definitions/416.html) - **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.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 S7-1500 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 1514SP F-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1514sp-f-2-pn.md) · [Siemens SIMATIC S7-1500 CPU 1514SP-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1514sp-2-pn.md) · [Siemens SIMATIC S7-1500 CPU 1514SPT F-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1514spt-f-2-pn.md) · [Siemens SIMATIC S7-1500 CPU 1514SPT-2 PN](https://agentprime.io/advisories/technology/siemens-simatic-s7-1500-cpu-1514spt-2-pn.md) - **Published:** 12 Dec 2023 - **Updated:** 25 Feb 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: siemens) at 12 Dec 2023, 11:27 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: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC Drive Controller CPU 1507D TF. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants). - affected: `before V30.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP F-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1510SP-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511C-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511C-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511C-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511F-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511T-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511T-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511TF-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1511TF-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512C-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512C-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512C-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP F-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1512SP-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513-1 PN. - affected: `before V3.1.0` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513F-1 PN. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC S7-1500 CPU 1513F-1 PN. - affected: `before *` (custom) - Other versions: unknown And 113 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 - 7.5 High, CVSS 3.1: `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`, from CNA (siemens) - **CISA KEV:** Not listed. - **EPSS:** 0.012, the 69th 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 12 Dec 2023. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2023-46156](https://www.cve.org/CVERecord?id=CVE-2023-46156) - [NVD: CVE-2023-46156](https://nvd.nist.gov/vuln/detail/CVE-2023-46156) ### 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: .