What is CVE-2022-24750?

CVE-2022-24750 is a high-severity vulnerability in Ultravnc, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2022-03-10.

How severe is CVE-2022-24750?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2022-24750 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Privilege escalation in Ultravnc

CVE-2022-24750

UltraVNC is a free and open source remote pc access software. A vulnerability has been found in versions prior to 1.3.8.0 in which the DSM plugin module, which allows a local authenticated user to achieve local privilege escalation (LPE) on a vulnerable system. The vulnerability has been fixed to allow loading of plugins from the installed directory. Affected users should upgrade their UltraVNC to 1.3.8.1. Users unable to upgrade should not install and run UltraVNC server as a service. It is advisable to create a scheduled task on a low privilege account to launch WinVNC.exe instead. There are no known workarounds if winvnc needs to be started as a service.

Vulnerability class: Privilege Escalation

Published 2022-03-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Ultravnc — versions < 1.3.8.0
Uvnc Ultravnc

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

Public proof-of-concept exploits

References

github.com/ultravnc/UltraVNC/security/advisories/GHSA-3mvp-cp5x-vj5g (Third Party Advisory)
github.com/ultravnc/UltraVNC/commit/36a31b37b98f70c1db0428f5ad83170d604fb352 (Patch, Third Party Advisory)
github.com/bowtiejicode/UltraVNC-DSMPlugin-LPE (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2022-24750?: CVE-2022-24750 is a high-severity vulnerability in Ultravnc, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2022-03-10.
How severe is CVE-2022-24750?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2022-24750 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.