# CVE-2023-27830: TightVNC: Improper Privilege Management

CVE-2023-27830 is fixed in TightVNC on 1 platform by TightVNC 2.8.78 (version 2.8.78), released March 28, 2023. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2023-27830
- Priority: Urgent
- CVSS: 9.0
- EPSS: 0.0108
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 12, 2023
- Weakness: CWE-269: Improper Privilege Management
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2023-27830

## Description

TightVNC before v2.8.75 allows attackers to escalate privileges on the host operating system via replacing legitimate files with crafted files when executing a file transfer. This is due to the fact that TightVNC runs in the backend as a high-privileges account.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | TightVNC | 2.8.78 | [TightVNC 2.8.78](https://patchblox.com/security/data/fix/windows-app/glavsoft.tightvnc-2.8.78.md) | Mar 28, 2023 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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