EUVD-2026-60363
GHSA-fvc4-6443-69v6
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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 endpoint requires low-privilege authentication (PR:L); null dereference crashes device with no scope change, confidentiality, or integrity impact.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/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
Lifecycle Timeline
4DescriptionCVE.org
A vulnerability was detected in TOTOLINK EX1200L 9.3.5u.6146_B20201023. This affects the function setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation results in null pointer dereference. The attack can be launched remotely. The exploit is now public and may be used.
AnalysisAI
Denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows authenticated remote attackers to crash the device by sending a crafted request to the setWizardCfg function in /cgi-bin/cstecgi.cgi, triggering a null pointer dereference. Impact is limited strictly to availability - no confidentiality or integrity compromise - but a publicly available proof-of-concept exploit on GitHub (CVSS 4.0 E:P) significantly lowers the exploitation barrier. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Low-privilege authentication to the device's HTTP management interface is required, as established by the CVSS 4.0 PR:L metric - exploitation cannot proceed without first obtaining or brute-forcing valid credentials. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 7.1 with vector AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N reflects a remotely exploitable, low-complexity denial-of-service with no confidentiality or integrity impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained low-privilege credentials to the TOTOLINK EX1200L web management interface sends a specially crafted HTTP POST request targeting the setWizardCfg handler in /cgi-bin/cstecgi.cgi. The malformed parameter triggers a null pointer dereference within the function, causing the CGI process to crash and the device to become unresponsive, disrupting network connectivity for all users behind the extender. … |
| Remediation | No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: restrict network access to the management interface (/cgi-bin/cstecgi.cgi and port access to affected TOTOLIK EX1200L devices) to documented trusted administrative IP addresses only; audit device access logs for unauthorized setWizardCfg function calls. …
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Remote denial-of-service in TOTOLINK EX1200L firmware 9.3.5u.6146_B20201023 allows a low-privileged authenticated attack
Stack-based buffer overflow in the Totolink EX1200L router's login handler (cgi-bin/cstecgi.cgi) allows remote attackers
Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Null Pointer Dereference
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External POC / Exploit Code
Leaving vuln.today