CVE-2026-5841Public exploitNetwork attack vector

Unauthenticated administrative access via URL traversal

Published Apr 9, 2026 · Updated Apr 9, 2026

Path traversal in Tenda i3 firmware 1.0.0.6(2204) allows remote attackers to access protected administration pages without authentication. R7WebsSecurityHandler trusts public URL prefixes without canonicalizing the remaining path before authorization. A crafted path such as /lang/../system_upgrade.asp reaches a protected page and grants unauthenticated administrative access over HTTP.

CVSS severity9.8
Critical
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Tenda i3 firmware 1.0.0.6(2204) allows remote attackers to access protected administration pages without authentication. R7WebsSecurityHandler trusts public URL prefixes without canonicalizing the remaining path before authorization. A crafted path such as /lang/../system_upgrade.asp reaches a protected page and grants unauthenticated administrative access over HTTP.

The record

CVE
CVE-2026-5841
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
i3
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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=1.0.0.6(2204)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · i3version=1.0.0.6(2204)

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

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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