Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600 (CVE-2026-76653) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-76653

Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600

Answer in brief

CVE-2026-76653 records a Unknown severity vulnerability in Missing Authentication in VPN Configuration Management in TP-Link TL-MR6400 and Archer MR600. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./Archer MR600 (generic), TP-Link Systems Inc./TL-MR6400 v8 (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 10, 2026Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

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 TP-Link Systems Inc./Archer MR600 (generic), TP-Link Systems Inc./TL-MR6400 v8 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
TP-Link Systems Inc./Archer MR600generic	>=v3 <MR600(EU)_V3_1.4.0 Build 260827 \|\| >=v2 <MR600(EU)_V2_1.12.0 Build 2600826	MR600(EU)_V3_1.4.0 Build 260827, MR600(EU)_V2_1.12.0 Build 2600826
TP-Link Systems Inc./TL-MR6400 v8generic	>=0 <1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n	1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n

Recommended response

Check inventory. Check lockfiles and deployed manifests for TP-Link Systems Inc./Archer MR600, TP-Link Systems Inc./TL-MR6400 v8.
Review the reported fix. Update TP-Link Systems Inc./Archer MR600 to MR600(EU)_V3_1.4.0 Build 260827; TP-Link Systems Inc./TL-MR6400 v8 to 1.5.0 0.9.1 v0001.0 Build 260610 Rel.67978n if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

A missing authentication vulnerability in the VPN configuration management has been identified in Archer MR600 (v2, v3 & v5) and TL-MR6400 v8 due to improper access control; a remote unauthenticated attacker may be able to access and modify VPN configuration information without valid credentials. Successful exploitation may allow a remote unauthenticated attacker to disclose and modify VPN configuration information.

Quoted source text, attributed separately from HOL analysis.