CVE-2026-111675
7.4HighPublished 16 Oct 2026 · NVD status: Deferred · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
- Impact
- High impact on confidentiality, integrity
- Weakness
- CWE-307
Impact
Unauthenticated attackers can take over accounts by brute-forcing 6-digit SMS or email verification codes. The attacker only needs network access and a target user's phone number or email address.
Root cause
The application never expires, invalidates, or rate-limits attempts against generated 6-digit verification codes across login and password reset endpoints.
Affected systems
Course-tencent-cloud through 2.0.1
CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Fix & remediation
No fixed version is listed. Block or rate-limit requests to the password reset and verify login endpoints at your reverse proxy or WAF, or restrict access to the application until code fixes are deployed.
AI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
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.
References
- 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