CVE-2025-34117: Netcore Technology Router firmware

Netcore / Netis Routers RCE via UDP Port 53413 Backdoor

CVSS 9.3 CriticalCriticalEPSS 0.21 · 97th percentile

Critical, because:

CVSS score 9.3: 9.0 or more.
CVSS score 9.3 (7.0 or more) and EPSS 0.21 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: VulnCheck) at 16 Jul 2025, 21:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Netcore Technology	Router firmware	affected Prior to August 2014 Other versions: affected
Netis	Router firmware	affected Prior to August 2014 Other versions: affected

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.3	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.21, the 97th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 16 Jul 2025. New records show when each source confirmed them.

Sources

References from the CNA

web.archive.org/web/20140828114943/http://blog.trendmicro.com/trendlabs-security-intelligence/netis-routers-leave-wide-open-backdoor/ third-party-advisorytechnical-description
www.seebug.org/vuldb/ssvid-90227 third-party-advisorytechnical-description
www.shadowserver.org/what-we-do/network-reporting/netcore-netis-router-vulnerability-scan-report/ third-party-advisory
www.vulncheck.com/advisories/netcore-netis-routers-backdoor-rce third-party-advisory
raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/linux/misc/netcore_udp_53413_backdoor.rb exploit
vulners.com/metasploit/MSF:EXPLOIT-LINUX-MISC-NETCORE_UDP_53413_BACKDOOR- third-party-advisoryexploit
www.exploit-db.com/exploits/43387 exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.