CVE-2026-111675

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

CVSS score

9.1

EPSS probability

%0.4

Risk score

0.0

Published

1 d ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Course-tencent-cloud Verification Code Brute Force and Account Takeover Vulnerability

Sources read

Source agreement

0/2

Evidence confidence

%39

Short explanation

Course-tencent-cloud through version 2.0.1 is vulnerable due to improper restriction of authentication attempts. Unauthenticated attackers can brute-force 6-digit SMS or email verification codes by rotating source IPs against password reset and verify login endpoints, leading to account takeover.

Why does it matter?

This vulnerability allows attackers to take over user accounts if they know the victim's phone number or email address. There is a conflict among sources regarding the CVSS base score, with values ranging from 7.4 to 9.1.

What should be done?

Implement attempt limits for verification codes
Invalidate verification codes after use or expiration
Follow vendor advisories for updates

Note on uncertainty

3 alanda kaynak uyuşmazlığı var. DayBreach bu değerleri saklamadı; kaynak karşılaştırması aşağıda gösteriliyor.

Chain of evidence and sources4 verified claims

Course-tencent-cloud sürüm 2.0.1 ve öncesi, 6 haneli SMS veya e-posta doğrulama kodlarının uygunsuz kimlik doğrulama kısıtlamaları nedeniyle kaba kuvvet saldırısına uğramasına açıktır.

S0 · daybreach-canonical S1 · cvelist

Saldırganlar, kurbanın telefonunu veya e-postasını bilerek şifre sıfırlama ve giriş doğrulama uç noktalarında IP adreslerini döndürüp hesapları ele geçirebilir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Kaynaklar arasında CVSS taban puanı konusunda çelişki mevcut olup skorlar 9.1 ile 7.4 arasında bildirilmiştir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Yama durumu UNKNOWN olarak değerlendirilmiştir ve resmî kaynaklarda yama durumu doğrulanamamıştır.

S0 · daybreach-canonical

Show the technical text from the sources

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

CWE: CWE-307

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-111675 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	xiaochong0302	course-tencent-cloud	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
9.1	CVSS V40	CRITICAL	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
9.1	CVSS V4_0	CRITICAL	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	CVE CNA
7.4	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	NVD
7.4	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-111675 is associated with the following CWEs:

CWE-307: Common Weakness Enumeration Entry CWE-307

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-111675 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeovervendor-advisory https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73vendor-advisory https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.phpvendor-advisory VulnCheck Advisory: Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeovervendor-advisory

CVSS Vector Radar Chart

9.1 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)High

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

xiaochong0302

Weakness Type (CWE & CAPEC)

CWE-307

Get this vulnerability through the API

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