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CVE-2025-13942 is an unauthenticated OS command injection vulnerability in the UPnP function of Zyxel EX3510-B0 firmware. Firmware versions through 5.17(ABUP.15.1)C0 are affected. The flaw can be triggered by sending specially crafted UPnP SOAP requests to the vulnerable service, causing attacker-controlled input to be incorporated into operating system command execution. Because the issue is reachable over the network and does not require authentication, a remote attacker can exploit it to execute commands on the underlying device operating system. The vulnerability is classified as CWE-78.
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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.
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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.
32 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unauthenticated command injection vulnerability in a Zyxel UPnP daemon that can lead to remote code execution.
An unauthenticated command injection vulnerability in the Zyxel UPnP daemon that can lead to remote code execution.
Unknown (listed as a trending CVE affecting Zyxel products).
Unknown (listed as a trending CVE affecting Zyxel; no technical details provided in the content).
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.