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CVE-2026-42566 is a denial-of-service vulnerability in Meshtastic prior to version 2.7.23.b246bcd affecting BLE management through the iOS application. A node can advertise a User.long_name containing malformed character encoding. At least one firmware code path could insert a null terminator in the middle of a multibyte sequence, producing an invalidly encoded long name in the node database. That malformed entry then propagates through the mesh and is consumed by downstream clients. Because the iOS app strictly validates encoding, it can fail to parse a node database containing the poisoned entry. This causes BLE synchronization to enter a repeated failure and retry condition, preventing normal management of the affected radio through the iOS app. The issue is notable because the malformed value does not require deliberate attacker-crafted input and can arise naturally from buffer truncation behavior.
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No public exploit code observed for this vulnerability.
9 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.