F4: Serial-gated factory restore (V3.5.2.1)

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Document type: local CVE candidate assessment, not a published CVE Record. CVE ID: unassigned. Product scope: Anpviz IPC-D240W-S V3.5.2.1 captured from the owner’s MCA40E camera; the V3.6.3.1 comparison image is an MCA50E image sent in error and was not flashed to this model.

Finding

The old restore path uses a serial gate. The new image requires operator authentication but accepts the F1 recovery value.

Status in this image: original finding or lead.

Evidence limit: The earlier live reset test produced no observed reset; scope depends on runtime flag state.

Classification and severity

• Proposed CWE: CWE-306
• CVSS v4.0 score: Not scored — current evidence does not support a defensible numeric impact/attack vector, this version lacks the issue, or the specific defect was fixed.
• CVSS v4.0 vector: Not assigned.
• Scoring basis: The earlier live reset test produced no observed reset; scope depends on runtime flag state.
• CVE candidacy: Needs coordinator/CNA review for grouping, affected models and version status; do not equate this finding ID with a CVE ID.

Source screenshots

The PNGs are rendered, line-numbered excerpts of existing Ghidra C-like decompilation, not photographs of the Ghidra GUI or recovered vendor source. The original export is authoritative; image selection can omit relevant lines elsewhere in the function.

• F4: serial-gated restore — F4-RESTORECONFIG-old — V3.5.2.1/F4/F4-RESTORECONFIG-old.c lines 28–44; source SHA-256 da9e05cd636f533b411abe5173a9bbd2b68c14cb5045534ea471352e68c8462f.

Related published CVEs

• No verified related CVE linked to this specific finding; this is not an exhaustive database search.

Case references

• Evidence index
• Initial public report
• Remediation review
• CERT/CC VRF #26-10-FZTVG; CISA Case #116607.

Source exports

• F4-RESTORECONFIG-old.c