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CVE-2026-55708 is a low-severity privacy and configuration vulnerability in NLnet Labs Unbound affecting versions 1.6.0 through 1.25.1. When the unbound-control commands view_local_data or view_local_datas are used on an already configured named view that initially has no local data, Unbound creates a local zones tree for that view but fails to populate it with the resolver’s default-protected zones. These omitted defaults include locally handled namespaces such as RFC 1918 reverse zones, AS112 zones, .onion, and .localhost. As a result, the affected view is initialized in an insecure state that does not preserve the expected local-policy protections for those names.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.