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PUBLISHED

2026-05-26 15:16

MODIFIED

2026-05-26 15:16

CVSS_SCORE V3

8.7

EPSS (Prob. Exploit)

1.37%

Top 28.2%

DATA SOURCES:

NVD 🔗 2026-05-26 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-11-01 OSV 🔗 2026-11-02

> DESCRIPTION

FreeRDP before 3.26.0 contains a heap-buffer-overflow vulnerability in gdi_CacheToSurface that allows remote attackers to write out-of-bounds heap memory. The vulnerability occurs because rectangle validation clamps coordinates to UINT16_MAX but performs copy operations using unclamped cache entry dimensions, enabling malicious RDP servers to trigger large out-of-bounds writes and potentially achieve remote code execution or client crash.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR

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

> MÉTRIQUES CVSS DÉTAILLÉES

                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
            

Métrique	Valeur	Interprétation
AV (Vecteur d'Attaque) Attack Vector	Network (N)	Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque) Attack Complexity	Low (L)	Peu de conditions requises pour exploiter
PR (Privilèges Requis) Privileges Required	None (N)	Aucune authentification requise
UI (Interaction Utilisateur) User Interaction	Unknown (P)	Interaction inconnue
S (Périmètre) Scope	Unchanged (U)	Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité) Confidentiality Impact	High (H)	Divulgation totale d'informations
I (Impact Intégrité) Integrity Impact	High (H)	Modification totale des données possible
A (Impact Disponibilité) Availability Impact	High (H)	Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité

High

Divulgation totale d'informations

Intégrité

High

Modification totale des données possible

Disponibilité

High

Interruption totale du service possible

> WEAKNESSES

CWE-122

> CWE DETAILED DESCRIPTIONS

CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap.

> RED HAT SECURITY ADVISORIES

RHSA-2026:36203 IMPORTANT

Red Hat Security Advisory: freerdp security update

An update for freerdp is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System...

RHSA-2026:46393 IMPORTANT

Red Hat Security Advisory: freerdp security update

An update for freerdp is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vul...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

FreeRDP - Heap-buffer-overflow in gdi_CacheToSurface via rectangle validation bypass

AFFECTED PACKAGES:

Unknown / Unknown

38 versions affected

ALIASES:

CVE-2026-44421, GHSA-p6r2-4hgm-m6ff

> HISTORIQUE DES MODIFICATIONS

Première apparition

26/05/2026 15:16

Source: NVD

📊 ENRICHISSEMENT 01/11/2026 06:59

CWE

Champ modifié: Description CWE

Ancienne valeur:

CWE-122: Heap-based Buffer Overflow - A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the bu...

Nouvelle valeur:

CWE-122: Heap-based Buffer Overflow - The product writes past the end of a buffer that was allocated on the heap.

📊 ENRICHISSEMENT 01/06/2026 06:01

CWE

Champ modifié: Description CWE

Ancienne valeur:

N/A

Nouvelle valeur:

Total des modifications: 2 Dernière mise à jour: 6 days ago