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Vulnerability record · CVE-2008-3493 · published 6 August 2008

CVE-2008-3493: Realvnc windows client improper input validation vulnerability

Realvnc · Realvnc Windows Client

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.

5.0 CVSS 2.0 Medium EPSS 5.6% · top 7.3% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
5.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/30499
https://exchange.xforce.ibmcloud.com/vulnerabilities/44218
https://www.exploit-db.com/exploits/6181
http://www.securityfocus.com/bid/30499
https://exchange.xforce.ibmcloud.com/vulnerabilities/44218
https://www.exploit-db.com/exploits/6181

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2008-3493), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.