CVE-2026-107611
Last modified
CVE-2026-107611 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared palette size. readPaletteRleTile() and readPackedPaletteTile() use the attacker-supplied index to look up colours without validating it against the palette size; out-of-bounds heap data is copied into the framebuffer (garbled display) or the read faults, terminating the viewer..
Description
An out-of-bounds read vulnerability in the ZRLE decoder of GlavSoft TightVNC Viewer for Windows before 2.8.88 allows a malicious or compromised VNC server to read heap memory beyond the palette allocation and crash the viewer by sending ZRLE-encoded tiles whose palette indices exceed the declared palette size. readPaletteRleTile() and readPackedPaletteTile() use the attacker-supplied index to look up colours without validating it against the palette size; out-of-bounds heap data is copied into the framebuffer (garbled display) or the read faults, terminating the viewer.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| GlavSoft | TightVNC | < 2.8.88 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-107611?
How severe is CVE-2026-107611?
How do I fix CVE-2026-107611?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-107586Uncontrolled eviction in the browser session table of the RE…4.3
- CVE-2026-107587Improper certificate validation in the webmail of Progressiv…5.9
- CVE-2026-107589Insufficient job validation for service accounts in Jacamar …7.5
- CVE-2026-1076The Star Review Manager plugin for WordPress is vulnerable t…4.3
- CVE-2026-107604A flaw was found in the installation provider and client reg…4.9
- CVE-2026-107608Improper link resolution before file access in the asset bun…5.5
- CVE-2026-107612Incorrect permission assignment in GlavSoft TightVNC Server …7.8
- CVE-2026-107613A NULL pointer dereference vulnerability in the Win8ScreenDr…5.9
- CVE-2026-107614An integer underflow in WinCursorShapeUtils::trimTransparent…6.1
- CVE-2026-107615An uncontrolled search path element vulnerability in GlavSof…7.8
- CVE-2026-107623A flaw was found in the OIDC Dynamic Client Registration (DC…4.3
- CVE-2026-10763PROMOD V is using insecure HTTP communication instead of HTT…7
Are you affected by CVE-2026-107611?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST