CVE Intelligence
Medium Injection

CVE-2025-15551 — LAN Code Execution on TP-Link Archer MR200, Archer C20, TL-WR850N and TL-WR845N

The response coming from TP-Link Archer MR200 v5.2, C20 v5 and v6, TL-WR850N v3, and TL-WR845N v4 for any request is getting executed by the JavaScript function like eval directly without any check. Attackers can exploit this vulnerability via a Man-in-the-Middle (MitM) attack to execute JavaScript code on the router's admin web portal without the user's permission or knowledge.

Published Feb 5, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: TPLink

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.4% (30-day exploitation probability)+6
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.45%
ahead of 37% of scored CVEs · Oct 14, 2026
Affects
TP-Link Systems Inc.
Archer C20 Firmware and 8 more
CVSS base
5.6
Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (TP-Link Systems Inc. Archer C20 Firmware, TP-Link Systems Inc. Archer C20 v5, TP-Link Systems Inc. Archer C20 v6…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
TP-Link Systems Inc. Archer C20 Firmware < 250630 Vulnerable NIST National Vulnerability Database
TP-Link Systems Inc. Archer C20 v5 < US_V5_260419< EU_V5_260317 Vulnerable CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc. Archer C20 v6 < 0.9.1 4.19 v0001.0 Build 250630 Rel.56583n Vulnerable CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc. Archer Mr200 Firmware < 250917 Vulnerable NIST National Vulnerability Database
TP-Link Systems Inc. Archer MR200 v5.2 < 1.2.0 Build 250917 Rel.51746 Vulnerable CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc. Tl-wr845n Firmware < 251031 Vulnerable NIST National Vulnerability Database
TP-Link Systems Inc. TL-WR845N v4 < 0.9.1 3.19 Build 251031 rel33710 Vulnerable CVE Program (cve.org) e CISA ADP
TP-Link Systems Inc. Tl-wr850n Firmware < 0.9.1_Build251205 Vulnerable NIST National Vulnerability Database
TP-Link Systems Inc. TL-WR850N v3 < 3.16.0 0.9.1 v6031.0 Build 251205 Rel.22089n Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
5.9 CVSS 4.0 Medium — — f23511db-6c3e-4e32-a477-6aa17d310630 via NIST National Vulnerability Database
5.9 CVSS 4.0 Medium — — TPLink via CVE Program (cve.org) e CISA ADP
5.6 CVSS 3.1 Medium 2.2 3.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-95 · Eval Injection

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.45%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · tp-link systems inc./archer mr200 v5.2, tp-link systems inc./archer c20 v6, tp link systems inc./tl-wr850n v3, tp link s
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 5.6
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Feb 5, 2026 · TPLink

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

10 on the record

Elsewhere on this site

TP-Link Systems Inc.
every CVE for this vendor
Injection
same class
CWE-95
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-75616 Command Injection in Router Web Management Interface Aug 19, 2026
  • CVE-2026-12001 Hardcoded Credential Vulnerability in Multiple TP-Link Router Models Jul 27, 2026
  • CVE-2026-11834 Unauthenticated Command Injection via DHCP Option Handling in Multiple TP-Link Routers Jun 22, 2026
  • CVE-2026-4346 Cleartext Storage of Administrative and Wi-Fi Credentials via Accessible Serial Interface in TP Link's TL-WR850N Mar 26, 2026
  • CVE-2026-0834 Logic Vulnerability on TP-Link Archer C20, Archer AX53 and TL-WR841N v13 Jan 21, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-15551 is "LAN Code Execution on TP-Link Archer MR200, Archer C20, TL-WR850N and TL-WR845N", rated Medium. It affects Archer C20 Firmware (TP-Link Systems Inc.); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.6 describes technical severity. EPSS 0.45% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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