CVE-2026-22220

Web-service interruption via malformed HTTP request

Published Feb 3, 2026 · Updated Feb 3, 2026

Improper input validation in TP-Link Archer BE230 v1.2 firmware allows remote authenticated users to interrupt its web service with crafted HTTP requests. The web module's HTTP processing path accepts malformed request input without adequate validation in versions before 1.2.4 Build 20251218 rel.70420; TP-Link has not disclosed the specific handler or field. Access must originate from an adjacent network with high privileges, and exploitation leaves the web interface temporarily unresponsive until recovery or reboot.

CVSS severity6.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in TP-Link Archer BE230 v1.2 firmware allows remote authenticated users to interrupt its web service with crafted HTTP requests. The web module's HTTP processing path accepts malformed request input without adequate validation in versions before 1.2.4 Build 20251218 rel.70420; TP-Link has not disclosed the specific handler or field. Access must originate from an adjacent network with high privileges, and exploitation leaves the web interface temporarily unresponsive until recovery or reboot.

The record

CVE
CVE-2026-22220
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
TP-Link Systems Inc.
Product
Archer BE230
Classifications
CWE-20, CAPEC-469, T1499
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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 <1.2.4 Build 20251218 rel.70420

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

TP-Link Systems Inc. · Archer BE230version=0 <1.2.4 Build 20251218 rel.70420

Published CVSS scores

6.8TP-Link Systems Inc.CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CAPEC-469HTTP DoS
T1499Endpoint Denial of Service

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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