# CVE-2026-123966: Tenda AC19 saveParentControlInfo heap-based overflow

Status: published. Published: 2026-11-07. Updated: 2026-11-07.

A vulnerability was determined in Tenda AC19 16.03.10.07. Affected by this issue is the function saveParentControlInfo of the file /goform/saveParentControlInfo. This manipulation of the argument deviceId causes heap-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Tenda / AC19: 16.03.10.07 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 10 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P; source: CNA: VulDB

- CVSS 3.1: 10 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 10 (critical); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 10 (critical); AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-122, CWE-119

## Exploit evidence

- exploit: https://github.com/Tmzop/Tenda-AC19-saveParentControlInfo/blob/main/report.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/432038 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/432038/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-123966 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1035173 (CNA: VulDB; third-party-advisory)

- https://github.com/Tmzop/Tenda-AC19-saveParentControlInfo/blob/main/report.md (CNA: VulDB; exploit)

- https://www.tenda.com.cn/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-123966; retrieved 2026-11-07; source updated 2026-11-07

Revision: 3cae1837e64530137c6716808113d3265cdf7d65c928824fc75e00a8d878cb08

Canonical: https://y2.dev/cve/CVE-2026-123966

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.