EUVD-2026-68300
GHSA-38w2-fwq3-3gp5
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/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 command injection requiring only low-privilege credentials; full OS command execution on embedded router firmware yields High C/I/A with no scope change.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
4DescriptionCVE.org
A vulnerability was identified in TOTOLINK NR1800X 9.1.0u.6681_B20230703. This affects the function setUssd of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ussd leads to command injection. The attack can be initiated remotely. The exploit is publicly available and might be used.
AnalysisAI
Command injection in TOTOLINK NR1800X firmware 9.1.0u.6681_B20230703 allows network-accessible attackers with low-privilege credentials to execute arbitrary OS commands by manipulating the 'ussd' parameter in the setUssd function exposed via /cgi-bin/cstecgi.cgi. A proof-of-concept exploit has been publicly released on GitHub, lowering the skill threshold for exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires low-privilege authentication to the TOTOLINK NR1800X web management interface, as reflected by PR:L in the CVSS 4.0 vector - an attacker must hold valid credentials before sending the malicious request. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 base score of 2.1 is materially inconsistent with its own vector: AV:N (network-reachable), AC:L (no special conditions), AT:N (no attack requirements), PR:L (low privileges), and UI:N (no user interaction) should produce a significantly higher score even before considering impact. … 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 has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Stack-based buffer overflow in the Totolink NR1800X router (firmware 9.1.0u.6279_B20210910) lets remote attackers corrup
Stack-based buffer overflow in TOTOLINK NR1800X firmware 9.1.0u.6681_B20230703 enables remote code execution through the
Command injection in Totolink NR1800X firmware 9.1.0u.6279_B20210910 allows authenticated remote attackers to execute ar
Same weakness CWE-77 – Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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