CVE-2026-41448Network attack vector

Unauthenticated admin access via token path traversal

Published Jun 8, 2026 · Updated Jun 8, 2026

Path traversal in AdGuard Home before 0.107.77 allows remote attackers to gain full administrative access through the web interface. The authglinet middleware concatenates the untrusted Admin-Token cookie value into a token-file path without constraining the resolved file to its intended directory. Exploitation requires the service to run with the --glinet flag; successful requests bypass authentication and expose all administrative functions.

CVSS severity9.2
Critical
EPSS probability0.54%
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 AdGuard Home before 0.107.77 allows remote attackers to gain full administrative access through the web interface. The authglinet middleware concatenates the untrusted Admin-Token cookie value into a token-file path without constraining the resolved file to its intended directory. Exploitation requires the service to run with the --glinet flag; successful requests bypass authentication and expose all administrative functions.

The record

CVE
CVE-2026-41448
Published
Jun 8, 2026
Updated
Jun 8, 2026
Vendor
AdGuard Software Limited
Product
AdGuard Home
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 8, 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 <0.107.77

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

AdGuard Software Limited · AdGuard Homeversion=0 <0.107.77

Published CVSS scores

9.2VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
9.4VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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