October was a busy month: Parallels RAS 22 shipped on the 30th, while the 21.2 branch still received three builds in three weeks. On the security side, good news: the PHP2Shell vulnerabilities do not affect RAS components. Here is everything worth remembering.
The October 2026 recap: new Parallels RAS builds, new KB articles, release notes, security advisories and articles published on RASInsider.
🚀 New builds
- RAS 21.2 —
21.2.2.27429: RAS Core and Agent Installer (detected on October 7) · release notes - RAS 21.2 —
21.2.2.27432: RAS Core and Agent Installer (detected on October 26) · release notes - RAS 21.2 —
21.2.2.27433: RAS Core and Agent Installer (detected on October 28) · release notes - RAS 22 —
22.0.0.28160: RAS Core, Agent Installer, Reporting Service, Perf Monitor and HALB Appliance (detected on October 30) · release notes
🛡️ Security
- KB 131223 — PHP2Shell vulnerabilities do not affect Parallels RAS components
📚 New KB articles
- KB 131221 — Azure Virtual Desktop resource opens the landing page instead of launching the application or desktop
- KB 131214 — How to prepare a Parallels RAS support request
- KB 131211 — Published apps and desktops fail to connect after Microsoft September 2026 Windows updates
Updated release notes
- KB 129018 — Parallels Remote Application Server v19 Release Notes
- KB 130036 — Parallels DaaS Release Notes
Plus 17 other updated KB articles, all in the KB Tracker.
✍️ On RASInsider this month
- 11 themes for the Parallels RAS User Portal: RASInsider Skin Manager
- Parallels RAS 21.2.2: two improvements for international sessions
- PowerShell keyboard input lost in remote sessions: PSReadLine
- Parallels RAS 21.2.2: build 27432 is now available
- Parallels RAS 22 is available: RASInsider starts its deep-dive series
To hear about new builds as soon as they ship, sign up for Build Alert; every version is listed on the component status page.
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