Medium severity · published Aug 24, 2026
CVE-2026-78417
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…
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RD
Remote Desktop Manager · Devolutions
before 2026.2.18; before 2026.1.25 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78417
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78417
devolutions.net
https://devolutions.net/security/advisories/DEVO-2026-0029/
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