CVE-2026-23534

CriticalCVSS 9.8/10Last modified Jul 15, 2026

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, a client-side heap buffer overflow occurs in the ClearCodec bands decode path when crafted band coordinates allow writes past the end of the destination surface buffer. A malicious server can trigger a client‑side heap buffer overflow, causing a crash (DoS) and potential heap corruption with code‑execution risk depending on allocator behavior and surrounding heap layout. Version 3.21.0 contains a patch for the issue.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-122

Affected software

No affected versions have been published.

Timeline

Published: Jan 19, 2026
Last modified: Jul 15, 2026
NVD status: Modified

Related CVEs from 2026

CVE-2026-235358.0wlc is a Weblate command-line client using Weblate's REST API. Prior to 1.17.2, the multi-translation download could write to an arbitrary l CVE-2026-235367.5A security issue was discovered in the Feast Feature Server's `/read-document` endpoint that allows an unauthenticated remote attacker to re CVE-2026-235379.1A vulnerability has been identified in the Feast Feature Server’s `/save-document` endpoint that allows an unauthenticated remote attacker t CVE-2026-235387.5A vulnerability was identified in the Feast Feature Server's `/ws/chat` endpoint that allows remote attackers to establish persistent WebSoc CVE-2026-23548.8The Swiss Toolkit For WP plugin for WordPress is vulnerable to arbitrary file upload due to a flawed file type validation bypass in the `upl CVE-2026-235417.5Missing Authorization vulnerability in WPFunnels Mail Mint mail-mint allows Accessing Functionality Not Properly Constrained by ACLs.This is CVE-2026-235429.8Deserialization of Untrusted Data vulnerability in ThemeGoods Grand Restaurant grandrestaurant allows Object Injection.This issue affects Gr CVE-2026-235435.3Missing Authorization vulnerability in WPDeveloper Essential Addons for Elementor essential-addons-for-elementor-lite allows Exploiting Inco CVE-2026-235448.8Deserialization of Untrusted Data vulnerability in codetipi Valenti valenti allows Object Injection.This issue affects Valenti: from n/a thr CVE-2026-235456.5Missing Authorization vulnerability in Aruba.it Dev Aruba HiSpeed Cache aruba-hispeed-cache allows Exploiting Incorrectly Configured Access CVE-2026-235466.5Insertion of Sensitive Information Into Sent Data vulnerability in RadiusTheme Classified Listing classified-listing allows Retrieve Embedde CVE-2026-235477.1Missing Authorization vulnerability in cmsmasters CMSMasters Content Composer cmsmasters-content-composer allows Exploiting Incorrectly Conf