D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one (CVE-2026-86297) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-86297

D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one

Answer in brief

CVE-2026-86297 records a Unknown severity vulnerability in D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one. The current sources do not mark it as known exploited. The current feed maps D-Link/DIR-605 (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 7, 2026Updated Sep 7, 2026Source checked Sep 7, 2026First seen by HOL Sep 7, 2026Material review Sep 7, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 D-Link/DIR-605 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
D-Link/DIR-605generic	B1v202WWB03	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for D-Link/DIR-605.
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 7, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 7, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 7, 2026

Sources and claim methodology

Upstream source description

A vulnerability was identified in D-Link DIR-605 B1v202WWB03. This issue affects the function tunnel_set_params of the file progs.gpl/pppd.alpha/l2tp/tunnel.c of the component L2TP Control Message Parser. Such manipulation of the argument peer_hostname leads to off-by-one. The attack may be performed from remote. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit is publicly available and might be used.

Quoted source text, attributed separately from HOL analysis.