PT-2026-40573 · Citrix · Netscaler

Published 2026-05-13 · Updated 2026-05-13 · CVE-2026-21021

Positive Technologies (AI Summary)

CVSS v3.1

6.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Citrix NetScaler versions prior to SMR May-2026 Release 1

Description Improper input validation in Routines allows physical attackers to launch privileged activity.

Recommendations Update to SMR May-2026 Release 1.

Fix

Related Identifiers

CVE-2026-21021

Affected Products

Netscaler

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-21021 · Security Note
• https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=05 · Vendor Advisory
• https://t.me/CVEtracker/53615 · Telegram Post