CVE-2026-111675 PUBLISHED

Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover

Assigner: VulnCheck
Reserved: 16.10.2026 Published: 16.10.2026 Updated: 16.10.2026

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 Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 9.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	High	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 7.4

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	xiaochong0302
Product	course-tencent-cloud
Versions	Default: unaffected affected from 0 to 2.0.1 (incl.)

CVE-2026-111675 PUBLISHED

Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover

Metrics

Product Status

Credits

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Problem Types