EUVD-2026-62668Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/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-delivered exploit via malicious server; user must connect (UI:R); OOB read yields high confidentiality and crash impact, no integrity change.
Primary rating from Vendor (vendor:alpine).
CVSS VectorVendor: vendor:alpine
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/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
Lifecycle Timeline
6DescriptionCVE.org
Alpine Linux: freerdp fixed in 3.27.1-r0
AnalysisAI
Out-of-bounds read in FreeRDP's H264 decompression codec allows a malicious or compromised RDP server to trigger memory disclosure and potential client crash when a user connects and receives crafted video frames with mismatched dimensions. Affected clients include all FreeRDP builds prior to 3.27.0 using any of the supported H264 backends (FFmpeg, OpenH264, Android MediaCodec, Windows Media Foundation). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must establish an RDP connection to an attacker-controlled or compromised server using a FreeRDP client built with H264 codec support. … 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/VC:H/VI:N/VA:H) reflects a realistic threat model: the attacker controls or impersonates an RDP server, requires no privileges on the victim system, and needs only passive user interaction (connecting to the server). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker operates a malicious RDP server and social-engineers or network-redirects a victim into connecting with a FreeRDP client. Once the RDP session begins streaming H264-encoded desktop video, the server sends frames encoded with dimensions smaller than the negotiated context dimensions. … |
| Remediation | Upgrade FreeRDP to version 3.27.0 or later, which includes the bounds-check fix across all four H264 backend decompress() functions (commit 0cd45b70bb1fe6befd258ff64c46461947e99adb). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct an inventory of FreeRDP installations across endpoints and infrastructure, prioritizing systems connecting to external or untrusted RDP servers. …
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
Leaving vuln.today