# Missing authorization in NEC Platforms, Ltd. Aterm W1200EX(-MS) and others CVE record · `CVE-2026-4309` - **Identifiers:** `CVE-2026-4309` - **State:** Confirmed - **Severity:** CVSS 6.3 Medium - **Critical:** No - **CNA:** NEC - **Weakness (CWE):** [CWE-862](https://cwe.mitre.org/data/definitions/862.html) - **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) - **Technologies:** [NEC Platforms, Ltd. Aterm W1200EX(-MS)](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-w1200ex-ms.md) · [NEC Platforms, Ltd. Aterm WG1200HP2](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hp2.md) · [NEC Platforms, Ltd. Aterm WG1900HP](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1900hp.md) · [NEC Platforms, Ltd. Aterm WG1200HS2](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hs2.md) · [NEC Platforms, Ltd. Aterm WG1800HP3](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1800hp3.md) · [NEC Platforms, Ltd. Aterm WG1200HP3](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hp3.md) · [NEC Platforms, Ltd. Aterm WG1900HP2](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1900hp2.md) · [NEC Platforms, Ltd. Aterm WG1200HS3](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hs3.md) · [NEC Platforms, Ltd. Aterm WG1800HP4](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1800hp4.md) · [NEC Platforms, Ltd. Aterm WG1200HP4](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hp4.md) · [NEC Platforms, Ltd. Aterm WG1200HS4](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200hs4.md) · [NEC Platforms, Ltd. Aterm WX1500HP](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wx1500hp.md) · [NEC Platforms, Ltd. Aterm WG2600HS](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg2600hs.md) · [NEC Platforms, Ltd. Aterm WF1200CR](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wf1200cr.md) · [NEC Platforms, Ltd. Aterm WG1200CR](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg1200cr.md) · [NEC Platforms, Ltd. Aterm WG2600HP4](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg2600hp4.md) · [NEC Platforms, Ltd. Aterm WG2600HM4](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg2600hm4.md) · [NEC Platforms, Ltd. Aterm WG2600HS2](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wg2600hs2.md) · [NEC Platforms, Ltd. Aterm WX3000HP](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wx3000hp.md) · [NEC Platforms, Ltd. Aterm WX3600HP](https://agentprime.io/advisories/technology/nec-platforms-ltd-aterm-wx3600hp.md) - **Published:** 27 Mar 2026 - **Updated:** 10 Apr 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: NEC) at 27 Mar 2026, 11:46 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: NEC Platforms, Ltd.. Product: Aterm W1200EX(-MS). - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HP2. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1900HP. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HS2. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1800HP3. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HP3. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1900HP2. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HS3. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1800HP4. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HP4. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200HS4. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WX1500HP. - affected: `Before Ver. 1.4.2` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG2600HS. - affected: `Before Ver. 1.7.2` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WF1200CR. - affected: `Before Ver. 1.6.0` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200CR. - affected: `Before Ver. 1.5.0` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG2600HP4. - affected: `Before Ver. 1.4.2` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG2600HM4. - affected: `Before Ver. 1.4.2` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG2600HS2. - affected: `Before Ver. 1.3.2` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WX3000HP. - affected: `Before Ver. 2.5.0` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WX3600HP. - affected: `Before Ver. 1.5.3` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm GX1200HP. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm GX1200HS4. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm WG1200DM4. - affected: `All versions` - Other versions: unknown - Vendor: NEC Platforms, Ltd.. Product: Aterm GB1200PE. - affected: `Before Ver. 1.3.1` - 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 - 6.3 Medium, CVSS 4.0: `CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N`, from CNA (NEC) - **CISA KEV:** Not listed. - **EPSS:** 0.0014, the 3rd 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 27 Mar 2026. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2026-4309](https://www.cve.org/CVERecord?id=CVE-2026-4309) - [NVD: CVE-2026-4309](https://nvd.nist.gov/vuln/detail/CVE-2026-4309) ### 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: .