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CVE-2026-55708 is an insecure default initialization flaw in NLnet Labs Unbound versions 1.6.0 through 1.25.1. When the unbound-control view_local_data or view_local_datas command adds local data to an existing named view that initially has no local data, Unbound creates that view's local-zone tree without populating its default-protected zones. These defaults include private-address reverse zones, AS112 zones, .onion, and .localhost. Consequently, queries for names that should be handled locally from clients assigned to the affected view can instead be processed by the iterator and sent to public DNS.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.