Off-by-one Error Affecting freerdp/freerdp package, versions [,3.25.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FREERDPFREERDP-16300107
- published26 Apr 2026
- disclosed24 Apr 2026
- creditMedoedus
Introduced: 24 Apr 2026
NewCVE-2026-40254 (opens in a new tab)How to fix?
Upgrade freerdp/freerdp to version 3.25.0 or higher.
Overview
Affected versions of this package are vulnerable to Off-by-one Error via the drive redirection process. An attacker can access or modify files outside the intended shared directory by exploiting an off-by-one error in the path traversal filter when connecting to a malicious server with drive redirection enabled.
Workaround
This vulnerability can be mitigated by avoiding connections to untrusted RDP servers with drive redirection enabled and by not using the /drive or /d command-line options in FreeRDP clients.