CVE-2026-34408Public exploitNetwork attack vector

Account takeover via space-only reset token

Published May 5, 2026 · Updated May 5, 2026

Weak password recovery in Gambio 4.9.2.0 allows remote attackers to set an arbitrary password for any account with a known ID. The password_double_opt.php save_password action passes customers_id and key to PasswordDoubleOptContentControl.inc.php, whose empty-string check accepts a space-only key and then writes the supplied password. No authentication or valid recovery token is required; knowledge of an account ID is enough to take over that account with its existing privileges.

CVSS severity9.1
Critical
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak password recovery in Gambio 4.9.2.0 allows remote attackers to set an arbitrary password for any account with a known ID. The password_double_opt.php save_password action passes customers_id and key to PasswordDoubleOptContentControl.inc.php, whose empty-string check accepts a space-only key and then writes the supplied password. No authentication or valid recovery token is required; knowledge of an account ID is enough to take over that account with its existing privileges.

The record

CVE
CVE-2026-34408
Published
May 5, 2026
Updated
May 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-640, T1098
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-640Weak Password Recovery Mechanism for Forgotten Password
T1098Account Manipulation

Public exploit references

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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