Heap-based Buffer Overflow Affecting freerdp/freerdp package, versions [2.0.0,3.31.0)
Threat Intelligence
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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- published18 Oct 2026
- disclosed15 Sept 2026
- creditUnknown
Introduced: 15 Sep 2026
CVE-2026-91964 (opens in a new tab)How to fix?
Upgrade freerdp/freerdp to version 3.31.0 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the nego_send_negotiation_request process when handling Server Redirection PDU messages containing attacker-controlled LoadBalanceInfo fields. An attacker can cause client crashes or achieve remote code execution by sending a specially crafted message with an arbitrary-length field that is written to a fixed-size buffer without validation.