# Deserialization of untrusted data in Siemens SIMATIC STEP 7 Safety V16 and others CVE record · `CVE-2023-32735` - **Identifiers:** `CVE-2023-32735` - **State:** Confirmed - **Severity:** CVSS 7.0 High - **Critical:** No - **CNA:** siemens - **Weakness (CWE):** [CWE-502](https://cwe.mitre.org/data/definitions/502.html) - **Tags:** [Insecure deserialization](https://agentprime.io/advisories/tag/deserialization.md) - **Technologies:** [Siemens SIMATIC STEP 7 Safety V16](https://agentprime.io/advisories/technology/siemens-simatic-step-7-safety-v16.md) · [Siemens SIMATIC STEP 7 Safety V17](https://agentprime.io/advisories/technology/siemens-simatic-step-7-safety-v17.md) · [Siemens SIMATIC STEP 7 Safety V18](https://agentprime.io/advisories/technology/siemens-simatic-step-7-safety-v18.md) · [Siemens SIMATIC STEP 7 V16](https://agentprime.io/advisories/technology/siemens-simatic-step-7-v16.md) · [Siemens SIMATIC STEP 7 V17](https://agentprime.io/advisories/technology/siemens-simatic-step-7-v17.md) · [Siemens SIMATIC STEP 7 V18](https://agentprime.io/advisories/technology/siemens-simatic-step-7-v18.md) · [Siemens SIMATIC WinCC Unified V16](https://agentprime.io/advisories/technology/siemens-simatic-wincc-unified-v16.md) · [Siemens SIMATIC WinCC Unified V17](https://agentprime.io/advisories/technology/siemens-simatic-wincc-unified-v17.md) · [Siemens SIMATIC WinCC Unified V18](https://agentprime.io/advisories/technology/siemens-simatic-wincc-unified-v18.md) · [Siemens SIMATIC WinCC V16](https://agentprime.io/advisories/technology/siemens-simatic-wincc-v16.md) · [Siemens SIMATIC WinCC V17](https://agentprime.io/advisories/technology/siemens-simatic-wincc-v17.md) · [Siemens SIMATIC WinCC V18](https://agentprime.io/advisories/technology/siemens-simatic-wincc-v18.md) · [Siemens SIMOCODE ES V16](https://agentprime.io/advisories/technology/siemens-simocode-es-v16.md) · [Siemens SIMOCODE ES V17](https://agentprime.io/advisories/technology/siemens-simocode-es-v17.md) · [Siemens SIMOCODE ES V18](https://agentprime.io/advisories/technology/siemens-simocode-es-v18.md) · [Siemens SIMOTION SCOUT TIA V5.4 SP1](https://agentprime.io/advisories/technology/siemens-simotion-scout-tia-v5-4-sp1.md) · [Siemens SIMOTION SCOUT TIA V5.4 SP3](https://agentprime.io/advisories/technology/siemens-simotion-scout-tia-v5-4-sp3.md) · [Siemens SIMOTION SCOUT TIA V5.5 SP1](https://agentprime.io/advisories/technology/siemens-simotion-scout-tia-v5-5-sp1.md) · [Siemens SINAMICS Startdrive V16](https://agentprime.io/advisories/technology/siemens-sinamics-startdrive-v16.md) · [Siemens SINAMICS Startdrive V17](https://agentprime.io/advisories/technology/siemens-sinamics-startdrive-v17.md) - **Published:** 9 Jul 2024 - **Updated:** 27 Aug 2025 - **Reviewed by a person:** No Published by the CVE Program (CNA: siemens) at 9 Jul 2024, 12:04 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 STEP 7 Safety V16. - affected: `before V16 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC STEP 7 Safety V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC STEP 7 Safety V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC STEP 7 V16. - affected: `before V16 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC STEP 7 V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC STEP 7 V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC Unified V16. - affected: `before V16 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC Unified V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC Unified V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC V16. - affected: `before V16.7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC V17. - affected: `before V17.7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMATIC WinCC V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOCODE ES V16. - affected: `before V16 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOCODE ES V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOCODE ES V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOTION SCOUT TIA V5.4 SP1. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOTION SCOUT TIA V5.4 SP3. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIMOTION SCOUT TIA V5.5 SP1. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SINAMICS Startdrive V16. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SINAMICS Startdrive V17. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SINAMICS Startdrive V18. - affected: `before *` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIRIUS Safety ES V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIRIUS Safety ES V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIRIUS Soft Starter ES V17. - affected: `before V17 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: SIRIUS Soft Starter ES V18. - affected: `before V18 Update 2` (custom) - Other versions: unknown - Vendor: Siemens. Product: Soft Starter ES V16. - affected: `before V16 Update 7` (custom) - Other versions: unknown - Vendor: Siemens. Product: TIA Portal Cloud V3.0. - affected: `before V18 Update 2` (custom) - Other versions: unknown ## 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 - 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C`, from CNA (siemens) - 7.0 High, CVSS 4.0: `CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`, from CNA (siemens) (used for this record) - **CISA KEV:** Not listed. - **EPSS:** 0.0021, the 11th percentile, on 6 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 9 Jul 2024. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2023-32735](https://www.cve.org/CVERecord?id=CVE-2023-32735) - [NVD: CVE-2023-32735](https://nvd.nist.gov/vuln/detail/CVE-2023-32735) ### 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: .