EUVD-2026-62667Severity by source
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
Network-reachable server-to-client flaw; user must initiate gateway connection (UI:R); attacker needs no privileges as they control the server side; impact is fully client-scoped.
Primary rating from Vendor (vendor:alpine).
CVSS VectorVendor: vendor:alpine
Lifecycle Timeline
6DescriptionCVE.org
Alpine Linux: freerdp fixed in 3.27.1-r0
AnalysisAI
Heap-based buffer overflow in FreeRDP's Remote Desktop Gateway RPC client allows a malicious or attacker-controlled gateway server to corrupt heap memory on a connecting client, potentially achieving arbitrary code execution. The flaw resides in libfreerdp/core/gateway/rpc_client.c, where stream capacity was sized against a server-supplied alloc_hint value rather than the actual stub data length, enabling a server to induce an undersized allocation followed by an out-of-bounds write. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The target must be running FreeRDP prior to version 3.27.0 and must route their RDP session through an RDP Gateway (RDG/RPC-over-HTTP) - standard direct RDP connections that bypass the gateway code path are not affected. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H) reflects a network-reachable, low-complexity flaw with full client-side impact, tempered only by the UI:P requirement that the victim user actively initiate an RDP gateway session. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade FreeRDP to version 3.27.0 or later; Alpine Linux users should update the freerdp package to 3.27.1-r0 or later via the standard apk upgrade mechanism. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory FreeRDP installations and identify systems running versions prior to 3.27.0 (upstream) or 3.27.1-r0 (Alpine Linux). …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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