Answer in brief
CVE-2026-91964 records a High severity (CVSS 8.7) vulnerability in FreeRDP 2.0.0 through 3.30.0 Heap Buffer Overflow via RoutingToken. The current sources do not mark it as known exploited. The current feed maps FreeRDP/FreeRDP (generic), FreeRDP/FreeRDP (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps FreeRDP/FreeRDP (generic), FreeRDP/FreeRDP (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| FreeRDP/FreeRDPgeneric | >=2.0.0 <3.0.0 || >=3.0.0 <3.31.0 | 3.31.0 |
| FreeRDP/FreeRDPgeneric | >=0 <3.31.0 | 3.31.0 |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.