Stack-based Buffer Overflow Affecting freerdp/freerdp package, versions [,3.20.1)
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-14947227
- published16 Jan 2026
- disclosed14 Jan 2026
- creditKim Dong Han
Introduced: 14 Jan 2026
CVE-2026-22858 (opens in a new tab)How to fix?
Upgrade freerdp/freerdp to version 3.20.1 or higher.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow in the crypto_base64_decode function due to improper handling of character signedness on Arm/AArch64 architectures. An attacker can trigger out-of-bounds memory access by supplying non-ASCII input that is used as an index into a global lookup table.