EUVD-2026-62660Severity 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 client-side flaw; no attacker privileges needed; user must initiate connection (UI:R); heap overflow enables full compromise of the client process.
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 AVC444/H264 codec allows a malicious RDP server to achieve remote code execution on connecting clients. The flaw resides in the avc444_ensure_buffer function in libfreerdp/codec/h264.c, where stride-height multiplication was performed without overflow guards, enabling an integer overflow to produce an undersized heap 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 FreeRDP client must negotiate and use AVC444 (H264-based RemoteFX) graphics mode with the RDP server - this is the codec path containing the vulnerable function. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P) places this at 8.7, reflecting low attack complexity and no required privileges on the attacker side, with only passive user interaction (the victim must connect). … 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 | The primary fix is upgrading FreeRDP to upstream version 3.27.0 or later (https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all endpoints running FreeRDP and classify exposure based on whether they connect to untrusted or external RDP servers; immediately restrict RDP connections to authenticated internal servers only through firewall and network segmentation policies. …
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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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