PT-2026-57005 · Zen Browser · Rdesktop

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-57501

NVD

CVSS v3.1

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N

Zen is a firefox-based browser. Prior to 1.21.5b, Zen's glance and split-view context-menu actions, Open link in glance and Split link in new tab, load a page-controlled link URL with the System principal instead of the originating page's principal, allowing a malicious web page to place a link to a file URL that can load with System privileges when opened through either context-menu item and bypass the content-to-file security check that blocks an ordinary click. This issue is fixed in version 1.21.5b.

Fix

Incorrect Privilege Assignment

Weakness Enumeration

CWE-266

Related Identifiers

CVE-2026-57501

Affected Products

Rdesktop

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-57501 · Security Note
• https://github.com/zen-browser/desktop/security/advisories/GHSA-vpvg-hp3v-rm5q · Note
• https://github.com/zen-browser/desktop/commit/44f7616238208200547c7df500d945752d7b6379 · Note
• https://github.com/zen-browser/desktop/releases/tag/1.21.5b · Note