Skip to main content

Mondoo

Vulnerability Management
Technology
Services

Solutions

Financial Services
Manufacturing
Healthcare

Resources

Blog
Vulnerability Database
Documentation
GitHub

Company

About
Careers
Partners
Contact

Legal

Privacy
Terms
Imprint

© 2026 Mondoo, Inc.

Log in Get Assessment

CVE-2026-47703 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2026-47703

CVE-2026-47703

MEDIUM6.3

AdGuard Home: DoQ-to-UDP State Reduction and Source-Port Oracle

Published Jul 15, 2026

Modified 1 months ago

Details

AdGuard Home is a network-wide software for blocking ads and tracking. Prior to 0.107.75, AdGuard Home's client-triggered DoQ forwarding path to a udp:// upstream reduced backend UDP DNS state by producing dns_id=0 or txid=0 and exposed a quoted-port ICMP source-port oracle, weakening DNS response matching for forwarded queries. This issue is fixed in version 0.107.75.

References

https://github.com/AdguardTeam/AdGuardHome/security/advisories/GHSA-xgx4-4h9w-53pv

https://www.cve.org/CVERecord?id=CVE-2026-47703

CVSS Analysis

CVSS v4.0

6.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

HighAC:H

Attack Requirements

PresentAT:P

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

LowVC:L

Vuln. Integrity

LowVI:L

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

NoneSI:N

Subseq. Availability

NoneSA:N

6.3/CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Weakness Type (CWE)

Cryptography

Insufficient Randomness

Other

Ecosystems

Timeline

PublishedJul 15, 2026

ModifiedJul 15, 2026