CVE-2025-15551

Admin-portal JavaScript execution via unchecked eval

Published Feb 5, 2026 · Updated Feb 5, 2026

Eval injection in TP-Link Archer MR200, Archer C20, TL-WR850N, and TL-WR845N allows man-in-the-middle attackers to run JavaScript. Each admin portal passes router responses directly to an eval-like JavaScript function without validation or neutralization. The attack requires interception and alteration of traffic while an administrator uses the portal, enabling script execution in that portal context.

CVSS severity5.9
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Eval injection in TP-Link Archer MR200, Archer C20, TL-WR850N, and TL-WR845N allows man-in-the-middle attackers to run JavaScript. Each admin portal passes router responses directly to an eval-like JavaScript function without validation or neutralization. The attack requires interception and alteration of traffic while an administrator uses the portal, enabling script execution in that portal context.

The record

CVE
CVE-2025-15551
Published
Feb 5, 2026
Updated
Feb 5, 2026
Vendor
TP-Link Systems Inc.
Product
TL-WR850N
Classifications
CWE-95, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 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 <3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · TL-WR850Nversion=0 <3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n
TP-Link Systems Inc. · Archer MR200version=0 <1.2.0 Build 250917 Rel.51746
TP-Link Systems Inc. · Archer C20version=0 <0.9.1 4.19 v0001.0 Build 250630 Rel.56583n
TP-Link Systems Inc. · TL-WR845Nversion=0 <0.9.1 3.19 Build 251031 rel33710

Published CVSS scores

5.6NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
5.9TPLinkCVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:P/VC:H/VI:L/VA:L/SC:N/SI:N/SA: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
T1203Exploitation for Client Execution

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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