CVE-2026-111675

Course-tencent-cloud through 2.0.1 contains an improper restriction of authentication attempts vulnerability that allows unauthenticated attackers to brute force 6-digit SMS/email verification codes, which are never invalidated or attempt-limited. Attackers who know a victim's phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php
https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73
https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover
https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover
https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover

Configurations

No configuration.

History

19 Oct 2026, 14:16

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover -~~	() https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-19 14:16

NVD link : CVE-2026-111675

Mitre link : CVE-2026-111675

CVE.ORG link : CVE-2026-111675

JSON object : View

Products Affected

No product.

CWE

CWE-307

Improper Restriction of Excessive Authentication Attempts

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