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CVE-2025-34117 is a remote code execution vulnerability affecting multiple Netcore and Netis router models running firmware released prior to August 2014. The issue stems from an undocumented backdoor service listening on UDP port 53413. The backdoor implements a hardcoded authentication mechanism and, after successful authentication, accepts shell commands for execution on the device. An unauthenticated remote attacker who can reach the exposed UDP service can send specially crafted packets to trigger command execution. Some affected models reportedly implement a non-standard variant of the echo command, which may influence exploit reliability or payload construction on those devices.
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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.
8 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.