VDB
CVE-2026-55193
CVE-2026-55193
PUBLISHED
CVSS 8.7 HIGH
Reported by GitHub_M · Published August 19, 2026
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, FreeRDP clients using TS Gateway accept a server-controlled max_xmit_frag value in libfreerdp/core/gateway/rpc_bind.c without bounding it to the 4088-byte ReceiveFragment allocation. A malicious gateway can advertise 65535 and then send a response fragment of the same length, causing rpc_channel_read in libfreerdp/core/gateway/rpc.c to write up to 65535 bytes into the smaller ReceiveFragment buffer. This can crash the client and may permit code execution through attacker-controlled heap corruption. This issue is fixed in version 3.27.0.
Risk Scores
CVSS 4.0
8.7
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| FreeRDP | FreeRDP | < 3.27.0 |
| alpine | freerdp | 0, 0, 0 |
| FreeRDP | FreeRDP | < 3.27.0, < 3.27.0, < 3.27.0 |
Timeline
- Jun 19, 2026 CVE Published
- Aug 24, 2026 EPSS Score
- Aug 26, 2026 EPSS Score
- Aug 30, 2026 EPSS Score
- Sep 3, 2026 EPSS Score
- Sep 4, 2026 Security Advisory
- Sep 6, 2026 EPSS Score
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7rp4-66mc-j9vx x_refsource_CONFIRM
- https://github.com/FreeRDP/FreeRDP/pull/12873 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/commit/a863ef1cf1cdabf9019280e5658f806e73bb50e8 x_refsource_MISC
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0 x_refsource_MISC