CVE-2026-77771Network attack vector

Second-factor bypass via client-keyed OTP lockout

Published Sep 10, 2026 · Updated Sep 10, 2026

Authentication bypass in miniOrange 2FA 6.2.8 through 6.3.0 and 18.0 through 19.2 allows remote authenticated users to defeat OTP checks. The attempt limiter keys failures to a client-supplied identifier rather than the targeted account, and a second OTP validation endpoint applies no limit. Knowledge of the victim password is required; changing the identifier permits unlimited OTP guesses and eventual account access.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in miniOrange 2FA 6.2.8 through 6.3.0 and 18.0 through 19.2 allows remote authenticated users to defeat OTP checks. The attempt limiter keys failures to a client-supplied identifier rather than the targeted account, and a second OTP validation endpoint applies no limit. Knowledge of the victim password is required; changing the identifier permits unlimited OTP guesses and eventual account access.

The record

CVE
CVE-2026-77771
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
miniOrange
Product
miniOrange 2FA
Classifications
T1110.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 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=18.0 <19.3
  2. Affected versionversion=6.2.8 <6.3.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

miniOrange · miniOrange 2FAversion=18.0 <19.3; version=6.2.8 <6.3.1

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1110.001Password Guessing

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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