CVE-2025-15517

Authorization Bypass in HTTP Server Endpoints on TP-Link Archer NX200, NX210, NX500 and NX600

HIGH
8.1
CVSS Score
Published: March 23, 2026 at 06:01 PM UTC
Updated: June 17, 2026 at 08:37 AM UTC
8 products affected across 1 vendorArcher NX500 FirmwareArcher NX200 FirmwareArcher NX600 Firmware

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Severity
HIGH8.1
Exploit prediction
EPSS 3%
SSVC
No known exploit

Description

A missing authentication check in the HTTP server on TP-Link Archer NX200, NX210, NX500 and NX600 to certain cgi endpoints allows unauthenticated access intended for authenticated users. An attacker may perform privileged HTTP actions without authentication, including firmware upload and configuration operations.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.3.0v < 1.8.0
tp-link-archer-nx200 (same device)
v < 1.3.0
tp-link-archer-nx210 (same device)
v < 1.3.0v < 1.5.0
tp-link-archer-nx500 (same device)
v < 1.3.0v < 1.4.0
tp-link-archer-nx600 (same device)
v < 1.3.0 Build 260311v < 1.8.0 Build 260311v < < 1.3.0 Build 260309
Affected range stops below 1.3.0 Build 260311, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.8.0 Build 260311, so it looks safe — our inference, not a vendor statement
Affected range stops below < 1.3.0 Build 260309, so it looks safe — our inference, not a vendor statement
v < 1.3.0 Build 260309v < 1.3.0 Build 260311
Affected range stops below 1.3.0 Build 260309, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.3.0 Build 260311, so it looks safe — our inference, not a vendor statement
v < 1.3.0 Build 260311v < < 1.5.0 Build 260309
Affected range stops below 1.3.0 Build 260311, so it looks safe — our inference, not a vendor statement
Affected range stops below < 1.5.0 Build 260309, so it looks safe — our inference, not a vendor statement
v < 1.3.0 Build 260309v < 1.3.0 Build 260311v < 1.4.0 Build 260311
Affected range stops below 1.3.0 Build 260309, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.3.0 Build 260311, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.4.0 Build 260311, so it looks safe — our inference, not a vendor statement

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-306

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