CVE-2025-15517

Unauthenticated configuration changes via unchecked CGI endpoints

Published Mar 23, 2026 · Updated Mar 23, 2026

Authentication bypass in TP-Link Archer NX200, NX210, NX500 and NX600 HTTP servers allows remote attackers to alter router configurations. Certain CGI endpoints omit the authentication check before accepting privileged HTTP actions, including firmware uploads and configuration operations. Access to an adjacent network is required; exploitation can disclose or modify device data but does not directly interrupt service.

CVSS severity8.6
High
EPSS probability2.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in TP-Link Archer NX200, NX210, NX500 and NX600 HTTP servers allows remote attackers to alter router configurations. Certain CGI endpoints omit the authentication check before accepting privileged HTTP actions, including firmware uploads and configuration operations. Access to an adjacent network is required; exploitation can disclose or modify device data but does not directly interrupt service.

The record

CVE
CVE-2025-15517
Published
Mar 23, 2026
Updated
Mar 23, 2026
Vendor
TP-Link Systems Inc.
Product
Archer NX600
Classifications
CWE-306
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.3.0 Build 260309
  2. Affected versionversion=0 <1.3.0 Build 260311
  3. Affected versionversion=0 <1.4.0 Build 260311

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · Archer NX600version=0 <1.3.0 Build 260309; version=0 <1.3.0 Build 260311; version=0 <1.4.0 Build 260311
TP-Link Systems Inc. · Archer NX210version=0 <1.3.0 Build 260309; version=0 <1.3.0 Build 260311
TP-Link Systems Inc. · Archer NX500version=0 <1.3.0 Build 260311; version=0 << 1.5.0 Build 260309
TP-Link Systems Inc. · Archer NX200version=0 << 1.3.0 Build 260309; version=0 <1.3.0 Build 260311; version=0 <1.8.0 Build 260311

Published CVSS scores

8.6TPLinkCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
8.1NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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