CVE-2025-9014Network attack vector

Unauthenticated portal denial of service via malformed Referer

Published Jan 15, 2026 · Updated Jan 15, 2026

Null pointer dereference in the TP-Link TL-WR841N v14 web portal before 250908 allows remote attackers to interrupt the portal service. The portal's Referer-header check inadequately validates a crafted header and dereferences a null pointer while processing the request. No authentication or user interaction is required; TP-Link has not disclosed the additional attack condition, and the reported interruption is limited to the management portal.

CVSS severity6.3
Medium
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in the TP-Link TL-WR841N v14 web portal before 250908 allows remote attackers to interrupt the portal service. The portal's Referer-header check inadequately validates a crafted header and dereferences a null pointer while processing the request. No authentication or user interaction is required; TP-Link has not disclosed the additional attack condition, and the reported interruption is limited to the management portal.

The record

CVE
CVE-2025-9014
Published
Jan 15, 2026
Updated
Jan 15, 2026
Vendor
TP-Link Systems Inc.
Product
TL-WR841N
Classifications
CWE-20, CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 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 <250908

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TP-Link Systems Inc. · TL-WR841Nversion=0 <250908

Published CVSS scores

6.3TPLinkCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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