EUVD-2026-68542
GHSA-mhch-vx27-6f9c
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Unauthenticated network dispatch (AV:N/AC:L/PR:N/UI:N); overwriting admin credentials is primarily integrity and availability (I:H/A:H), with no direct data disclosure so C:N - correcting the input's C:H/I:N.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Incorrect access control in the setPasswordCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to change the administrator account via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
AnalysisAI
Administrator account takeover in the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015) lets remote unauthenticated attackers overwrite the admin credentials by posting a crafted request to the setPasswordCfg handler on /cgi-bin/cstecgi.cgi. Because the endpoint enforces no access control, any attacker who can reach the web management interface can seize full administrative control of the device. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the router's web management endpoint /cgi-bin/cstecgi.cgi and the ability to send a POST invoking the setPasswordCfg function; per the CVSS vector (AV:N/AC:L/PR:N/UI:N) no authentication, no user interaction, and no special configuration are needed against the affected T6 firmware 4.1.5cu.748_B20211015. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are consistent and point to genuine high priority: the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes network-reachable, low-complexity, unauthenticated exploitation, and the outcome - resetting the admin account - is effectively full device compromise. … 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 version is identified in the provided data; the references are vendor-coordination READMEs (https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md and https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md) and the TOTOLINK download portal (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html), so check that portal for a firmware build newer than 4.1.5cu.748_B20211015 and apply it once available. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit network inventory for TOTOLINK T6 routers running firmware 4.1.5cu.748_B20211015 and determine which devices are reachable from untrusted networks; restrict administrative interface access to /cgi-bin/cstecgi.cgi to trusted IP ranges via firewall ACLs. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today