T10 Firmware
CVE-2025-9533
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK
2 techniques across 2 tactics: Defense Evasion, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 6.9 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.19%. |
| Exploit ScenarioDerived | A remote attacker could bypass authentication mechanisms to gain unauthorized access by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability. |
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Alert meAnalysisAIv1 – Mar 28, 2026
A vulnerability has been found in TOTOLINK T10 4.1.8cu.5241_B20210927. Rated medium severity (CVSS 6.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement multi-factor authentication, enforce strong password policies, use proven authentication frameworks.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Improper Authentication (CWE-287), which allows attackers to bypass authentication mechanisms to gain unauthorized access. A vulnerability has been found in TOTOLINK T10 4.1.8cu.5241_B20210927. Affected is an unknown function of the file /formLoginAuth.htm. The manipulation of the argument authCode with the input 1 leads to improper authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Affected products include: Totolink T10 Firmware.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability has been found in TOTOLINK T10 4.1.8cu.5241_B20210927. Affected is an unknown function of the file /formLoginAuth.htm. The manipulation of the argument authCode with the input 1 leads to improper authentication. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
Executive ViewAI
Organizations using A vulnerability should be aware of notable risk from CVE-2025-9533, a improper authentication vulnerability rated CVSS 6.9. This could allow unauthorized access to protected resources. Organizations should apply vendor updates when available and monitor for exploitation.
Apply vendor patch. If patching is delayed: restrict network access, enable MFA, monitor auth logs.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
More in T10 Firmware
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Critical buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the WiFi repeater configu
A critical buffer overflow vulnerability exists in TOTOLINK T10 firmware version 4.1.8cu.5207 in the setWiFiMeshName fun
Critical buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the setWiFiAclRules funct
Critical remote buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the setUpgradeFW f
Critical buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the UploadCustomModule fu
Critical buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the HTTP POST request han
Critical buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the setWiFiScheduleCfg fu
A vulnerability was found in TOTOLINK AC1200 T8 and AC1200 T10 4.1.5cu.861_B20230220/4.1.8cu.5207. Rated high severity (
A vulnerability was found in TOTOLINK AC1200 T8 and AC1200 T10 4.1.5cu.861_B20230220/4.1.8cu.5207. Rated high severity (
A vulnerability, which was classified as critical, was found in TOTOLINK AC1200 T8 and AC1200 T10 4.1.5cu.861_B20230220/
Privilege escalation and unauthorized file access affects TOTOLINK A7100RU (V7.4), A950RG (V5.9), and T10 (V5.9) routers
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