CVE-2008-3493

RealVNC Windows Client <4.1.2.0 - DoS

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2008-3493. PoCs published by beford.

AI-analyzed exploit summary This exploit targets a denial-of-service (DoS) vulnerability in RealVNC Windows Client version 4.1.2.0 by sending malformed RFB protocol data to crash the client. It sets up a fake VNC server and sends crafted packets to trigger the crash.

Description

vncviewer.exe in RealVNC Windows Client 4.1.2.0 allows remote VNC servers to cause a denial of service (application crash) via a crafted frame buffer update packet.

Exploits (1)

exploitdb WORKING POC VERIFIED
by beford · phpdoswindows
https://www.exploit-db.com/exploits/6181

This exploit targets a denial-of-service (DoS) vulnerability in RealVNC Windows Client version 4.1.2.0 by sending malformed RFB protocol data to crash the client. It sets up a fake VNC server and sends crafted packets to trigger the crash.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: RealVNC Windows Client 4.1.2.0
No auth needed
Prerequisites: Network access to the target · Target must initiate a connection to the attacker's server
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/6181
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/30499
Third Party Advisory, VDB Entry vdb-entry x_refsource_xf
https://exchange.xforce.ibmcloud.com/vulnerabilities/44218

Scores

EPSS 0.0563
EPSS Percentile 91.9%

Details

CWE
CWE-20
Status published
Products (1)
realvnc/realvnc_windows_client 4.1.2.0
Published Aug 06, 2008
Tracked Since Feb 18, 2026