{"apiVersion":"1.0","identifier":"CVE-2026-55194","description":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, rpc_client_recv_fragment in libfreerdp/core/gateway/rpc_client.c ensures the response reassembly stream capacity using only the server-declared alloc_hint rather than the actual StubLength about to be written. A malicious TS Gateway can send a PTYPE_RESPONSE with a small alloc_hint and a much larger frag_length, causing Stream_Write to copy attacker-controlled stub data beyond the 4096-byte pdu->s buffer. This can crash the client and may permit code execution through heap corruption. This issue is fixed in version 3.27.0.","publishedAt":"2026-08-19T18:16:44","lastModifiedAt":"2026-08-27T17:18:48","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55194","cvssScore":8.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","epssProbability":0.00459,"riskScore":0.91,"affectedProduct":"FreeRDP","affectedVersions":"<3.27.0","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-55194","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-55194","en":"https://www.redsauce.net/en/cves/CVE-2026-55194","fr":"https://www.redsauce.net/fr/cves/CVE-2026-55194","pt":"https://www.redsauce.net/pt/cves/CVE-2026-55194","de":"https://www.redsauce.net/de/cves/CVE-2026-55194","sk":"https://www.redsauce.net/sk/cves/CVE-2026-55194","el":"https://www.redsauce.net/el/cves/CVE-2026-55194"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-55194"}}