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FreeRDP EUVDEUVD-2026-62666

| CVE-2026-55648 MEDIUM
Integer Overflow or Wraparound (CWE-190)
N/A vendor:alpine
6.1
CVSS 4.0 · Vendor: vendor:alpine
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Unknown - insufficient vulnerability detail to construct kill chain

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK

1 technique across 1 tactic: Execution

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation conditions cannot be determined - the CVE description contains no technical detail about the vulnerability, required configuration, affected feature, protocol, or deployment mode. No CVSS vector is available to infer authentication requirements or attack vector. Authentication requirements are not confirmed from available data. Until a detailed advisory is published, defenders should not assume any specific exploitation prerequisite.

Impact

Risk assessment is severely limited by the absence of CVSS score, CVSS vector, EPSS score, CWE, KEV status, POC information, and a meaningful vulnerability description. The sole confirmed data point is that Alpine Linux issued a patched package (3.27.1-r0). No exploitation activity has been confirmed, no public exploit code has been identified, and CISA has not listed this in the KEV catalog. Attack vector, complexity, privilege requirements, and impact scope are all unknown. Security teams should treat this as an uncharacterized vulnerability requiring vendor follow-up before accurate prioritization is possible.

Exploit ScenarioDerived

An exploit scenario cannot be constructed from the available data. The vulnerability type, attack vector, and required conditions are entirely undisclosed. No proof-of-concept code has been identified, and no active exploitation has been confirmed.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 29, 2026

FreeRDP received a security fix in Alpine Linux package version 3.27.1-r0, addressing an undisclosed vulnerability. The nature, severity, and impact of the underlying flaw are not specified in the available intelligence - no CVE description, CVSS score, CWE classification, or advisory has been published at time of analysis. FreeRDP is an open-source RDP client and server implementation widely used on Linux systems; until further details are disclosed, the risk to affected deployments cannot be quantified.

RemediationAI

Upgrade the FreeRDP package on Alpine Linux to version 3.27.1-r0 or later using the Alpine package manager: 'apk upgrade freerdp'. This is the only confirmed remediation action available from the provided data. No specific workarounds have been documented because the underlying vulnerability type is unknown. If immediate patching is not possible, consider restricting access to systems running FreeRDP as a server, or limiting outbound RDP connections from hosts using FreeRDP as a client, until the vulnerability details are disclosed and risk can be properly assessed. No advisory URL is available to cite.

Affected VersionsENISA

FreeRDP < 3.27.0

Affected Packages

euvd freerdp fix: 3.27.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

FreeRDP is a free, open-source implementation of Microsoft's Remote Desktop Protocol (RDP), supporting both client and server roles. It is commonly used on Linux distributions to connect to Windows remote desktop environments or to host RDP-accessible sessions. Alpine Linux distributes FreeRDP as a package, and version 3.27.1-r0 of that package was identified as the fix release. No CWE is provided, so the root cause class - whether memory corruption, authentication bypass, input validation failure, or another category - cannot be determined from available data. No CPE strings were provided to further constrain the affected component.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (vendor:alpine) PRIMARY 6.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (vendor:alpine) · only source for this CVE.

CVSS VectorVendor: vendor:alpine

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
Passive
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
None
Vulnerable system: Availability
High
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

2
Patch available
Aug 19, 2026 - 19:18 EUVD
CVSS changed
Aug 19, 2026 - 18:22 NVD
6.1 (MEDIUM)

DescriptionCVE.org

Alpine Linux: freerdp fixed in 3.27.1-r0

Threat Intelligence Overview

EPSS Score
0.5%
Top 56% exploitable
Prevalence
Medium
widely used RDP client on Linux desktop and server deployments
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

31
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2026-25997 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_clipboard_format_equal before 3.23.0. Clipboard format comparison uses freed memory. Fifth

CVE-2026-25953 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Surface-to-window update triggers memory corrupti

CVE-2026-25952 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_SetWindowMinMaxInfo before version 3.23.0. X11 client window management triggers memory cor

CVE-2026-25959 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_cliprdr_provide_data clipboard handling before 3.23.0. Clipboard data exchange triggers mem

CVE-2026-22857 CRITICAL POC
9.8 Jan 14

FreeRDP IRP thread handler has a use-after-free where the IRP is freed by Complete() then accessed on the error path. Fi

CVE-2026-22854 CRITICAL POC
9.8 Jan 14

FreeRDP drive read heap overflow when server-controlled read length exceeds IRP output buffer. Fixed in 3.20.1. PoC avai

CVE-2026-22852 CRITICAL POC
9.8 Jan 14

FreeRDP client before 3.20.1 has a heap buffer overflow in AUDIN format processing. A malicious RDP server can corrupt m

CVE-2026-25955 CRITICAL POC
9.8 Feb 25

Use-after-free in FreeRDP xf_AppUpdateWindowFromSurface before 3.23.0. Different code path from CVE-2026-25953. PoC and

CVE-2024-32041 CRITICAL POC
9.8 Apr 22

FreeRDP is a free implementation of the Remote Desktop Protocol. Rated critical severity (CVSS 9.8), this vulnerability

CVE-2023-40574 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

CVE-2023-40569 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

CVE-2023-40567 CRITICAL POC
9.8 Aug 31

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Rated critical

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