Fast FAC1203R Gigabit Edition Device Discovery Service copy_msg_element stack-based overflow (CVE-2026-96257) | HOL Guard CVE

Critical · CVSS 10.0CVE-2026-96257

Fast FAC1203R Gigabit Edition Device Discovery Service copy_msg_element stack-based overflow

Answer in brief

CVE-2026-96257 records a Critical severity (CVSS 10.0) vulnerability in Fast FAC1203R Gigabit Edition Device Discovery Service copy_msg_element stack-based overflow. The current sources do not mark it as known exploited. The current feed maps Fast/FAC1203R Gigabit Edition (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 10.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Fast/FAC1203R Gigabit Edition (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Fast/FAC1203R Gigabit Editiongeneric	2.0.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Fast/FAC1203R Gigabit Edition.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

Upstream source description

A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Quoted source text, attributed separately from HOL analysis.