CVE-2026-55708

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

22/07/2026

Last modified:

24/07/2026

Description

In NLnet Labs Unbound 1.6.0 up to and including 1.25.1, the &#39;view_local_data&#39; and &#39;view_local_datas&#39; commands of &#39;unbound-control&#39; create a bare local zones tree for an already configured named view when the view is configured with no local data to begin with. However, the creation through the control interface omits adding the default-protected zones (e.g., RFC 1918 reverse, AS112 zones, .onion, .localhost). Once the local zone tree exists without the defaults, every query for a default-protected name from a client mapped to that view escapes to the public DNS via the iterator instead of being answered locally, bypassing local policy expectations.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 3.10 LOW
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

3.10

Severity 3.x

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:nlnetlabs:unbound::::::::	1.6.0 (including)	1.25.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-55708.txt