CVE-2026-56737Public exploitNetwork attack vectorHinoki check available

Account takeover via password-unbound TOTP verification

Published Sep 24, 2026 · Updated Sep 24, 2026

Authentication bypass in phpMyFAQ 3.2.0 through 4.1.5 allows remote attackers to take over 2FA-enabled accounts via TOTP verification. The public /admin/check handler accepts a numeric user ID and six-digit TOTP without requiring a session established by successful password authentication. A valid or brute-forced code creates the target user's authenticated session, so any 2FA-enabled account, including an administrator account, is exposed.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Authentication bypass in phpMyFAQ 3.2.0 through 4.1.5 allows remote attackers to take over 2FA-enabled accounts via TOTP verification. The public /admin/check handler accepts a numeric user ID and six-digit TOTP without requiring a session established by successful password authentication. A valid or brute-forced code creates the target user's authenticated session, so any 2FA-enabled account, including an administrator account, is exposed.

The record

CVE
CVE-2026-56737
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Thorsten Rinne
Product
phpMyFAQ
Classifications
T1078, T1110
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 3.2.0, < 4.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Thorsten Rinne · phpMyFAQversion=>= 3.2.0, < 4.1.6

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1078Valid Accounts
T1110Brute Force

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

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