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HighPublic exploit

MFA bypass in Termix TOTP disable and backup code endpoints

IdentifiersCVE-2026-45749CWE-308· Use of Single-factor Authentication

CVE-2026-45749 affects Termix, a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. In versions prior to 2.3.2, the POST /users/totp/disable and POST /users/totp/backup-codes endpoints permitted MFA-sensitive account operations using only the account password as authentication. As a result, an attacker who has obtained valid user credentials could disable TOTP protection entirely or regenerate backup codes without possessing the enrolled TOTP device and without supplying a valid TOTP code. This is an authentication design flaw affecting MFA-critical workflows and effectively defeats the intended second factor for those operations.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows an attacker with a compromised password to neutralize or circumvent MFA protections on the targeted Termix account. Specifically, the attacker can disable TOTP or generate fresh backup codes, enabling continued authenticated access without the legitimate user's second factor. This materially increases the likelihood of account takeover and unauthorized access to the platform's server management functionality, with resulting confidentiality and integrity impact on managed systems and data. The provided context indicates no direct availability impact.

Mitigation

If you can’t patch tonight, do this now.

If immediate upgrade is not possible, restrict access to the affected Termix instance, closely monitor for requests to POST /users/totp/disable and POST /users/totp/backup-codes, and alert on unexpected MFA changes. Force password resets for potentially exposed accounts, especially where phishing, credential stuffing, or password-hash exposure is suspected. Review and revoke regenerated backup codes where possible. These measures reduce exposure but do not fully remediate the underlying flaw.

Remediation

Patch, then assume compromise.

Upgrade Termix to version 2.3.2 or later, which patches the vulnerable MFA workflows. Ensure that all MFA-critical operations, including TOTP disablement and backup code regeneration, require verification with the enrolled second factor or an equivalently strong re-authentication mechanism rather than password-only confirmation.
PUBLIC EXPLOITS

Exploits

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VALID 0 / 0 TOTALView more in app

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EXPOSURE SURFACE

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VendorProductType
TermixTermixapplication

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Detection signatures

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Social activity5

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