# Mitsubishi Electric Corporation MELSEC-Q Series Q03UDVCPU: Improper Handling of Length Parameter Inconsistency vulnerability in Mitsubishi Electric… CVE record · `CVE-2025-8531` - **Identifiers:** `CVE-2025-8531` - **State:** Confirmed - **Severity:** CVSS 6.8 Medium - **Critical:** No - **CNA:** Mitsubishi - **Weakness (CWE):** [CWE-130](https://cwe.mitre.org/data/definitions/130.html) - **Tags:** [CWE-130](https://agentprime.io/advisories/tag/cwe-130.md) - **Technologies:** [Mitsubishi Electric Corporation MELSEC-Q Series Q03UDVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q03udvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q04UDVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q04udvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q06UDVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q06udvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q13UDVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q13udvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q26UDVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q26udvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q04UDPVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q04udpvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q06UDPVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q06udpvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q13UDPVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q13udpvcpu.md) · [Mitsubishi Electric Corporation MELSEC-Q Series Q26UDPVCPU](https://agentprime.io/advisories/technology/mitsubishi-electric-corporation-melsec-q-series-q26udpvcpu.md) - **Published:** 19 Sept 2025 - **Updated:** 24 Sept 2025 - **Reviewed by a person:** No Published by the CVE Program (CNA: Mitsubishi) at 19 Sept 2025, 09:30 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: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q03UDVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q04UDVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q06UDVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q13UDVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q26UDVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q04UDPVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q06UDPVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q13UDPVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected - Vendor: Mitsubishi Electric Corporation. Product: MELSEC-Q Series Q26UDPVCPU. - affected: `The first 5 digits of serial No. "24082" to "27081"` - Other versions: unaffected ## 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 - 6.8 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H`, from CNA (Mitsubishi) - **CISA KEV:** Not listed. - **EPSS:** 0.011, the 65th 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 19 Sept 2025. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2025-8531](https://www.cve.org/CVERecord?id=CVE-2025-8531) - [NVD: CVE-2025-8531](https://nvd.nist.gov/vuln/detail/CVE-2025-8531) ### References from the CNA - (vendor-advisory) - (government-resource) - (government-resource) 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: .