EUVD-2026-80038
GHSA-48c9-xhf8-82q7
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable CGI endpoint but exploitation demands an authenticated admin session, so PR:H with unchanged scope and full root-level impact.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
Lifecycle Timeline
3DescriptionCVE.org
Netcore NR255-V firmware version 1.5.130703 builds root-run command lines from unquoted user-supplied DDNS input in DDNSset_cgi.c and related ddns_Proc.c components, enabling os command argument injection. Attackers can exploit the unsanitized parameters to inject additional command arguments executed with root privileges.
AnalysisAI
Netcore NR255-V routers running firmware 1.5.130703 build root-privileged shell command lines from unquoted DDNS configuration input in DDNSset_cgi.c and related ddns_Proc.c code, letting an authenticated administrator inject extra command arguments that execute as root. Successful abuse yields complete device compromise, including configuration theft, traffic interception, and use of the router as a foothold into the LAN. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid administrative session or admin credentials for the NR255-V web management interface - the CVSS 4.0 vector states PR:H with UI:N, so no user interaction beyond the attacker's own authenticated request is needed, but the attacker must already be authenticated at the highest privilege level. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H) describes a network-reachable, low-complexity flaw that nonetheless requires high privileges - meaning an attacker must already hold a valid administrative session or credentials for the router's web interface, which materially narrows the realistic attack surface compared with an unauthenticated remote flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified at time of analysis; the disclosed fix path is Netcore firmware newer than 1.5.130703, so confirm availability directly with Netcore support and reference the VulnCheck advisory at https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-os-command-argument-injection-via-unquoted-ddns-parameters before assuming a fixed build exists. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same technique Command Injection
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External POC / Exploit Code
Leaving vuln.today