SEPTEMBER 16, 2026
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Case File

CVE-2026-91964

HIGH · CVSS 8.8 EPSS 0.55% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-16

CyberRota Analysis

AI-Generated

FreeRDP versions prior to 3.31.0 are susceptible to a heap-based buffer overflow due to improper handling of Server Redirection PDU messages, specifically in the LoadBalanceInfo fields. An attacker-controlled RDP server can exploit this vulnerability to crash the client or potentially execute arbitrary code by sending a specially crafted message. Organizations using affected versions of FreeRDP should prioritize patching to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution
GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-91964
Severity
HIGH
CVSS
8.8
EPSS
0.55%

Original NVD Description

FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.