CVE-2026-78417 Security feature bypass in Remote Desktop Manager
An on-path attacker can intercept and tamper with VNC sessions due to automatic acceptance of server RSA keys in Devolutions Remote Desktop Manager.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-78417?
CVE-2026-78417 is a medium-severity vulnerability in Devolutions Remote Desktop Manager, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Insufficient verification of data authenticity in the IronVNC client in Devolutions Remote Desktop Manager 2026.2.17.0 and earlier, 2026.1.24.0 and earlier, allows an on-path attacker to intercept and tamper with VNC sessions via automatic acceptance of the server's RSA key during RSA-AES authentication.
Weakness: CWE-345
Which versions are affected by CVE-2026-78417?
How do I fix CVE-2026-78417?
No fix has been published for CVE-2026-78417 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-78417 being exploited?
There is no known exploitation of CVE-2026-78417 in the wild and no public exploit code.
Sources
Also known as GHSA-v5j9-gh53-cfjx.