How severe is CVE-2008-3493?

CVE-2008-3493 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2008-3493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-3493?

CVE-2008-3493 affects Realvnc Realvnc Windows Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-3493?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-3493 published?

CVE-2008-3493 was published on 2008-08-06 and last updated on 2026-06-16.

CVE-2008-3493

CVE-2008-3493 is a medium-severity vulnerability in Realvnc Realvnc Windows Client with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Realvnc Realvnc Windows Client
Published: 2008-08-06
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2008-3493?: 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.
How severe is CVE-2008-3493?: CVE-2008-3493 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2008-3493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-3493?: CVE-2008-3493 affects Realvnc Realvnc Windows Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-3493?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-3493 published?: CVE-2008-3493 was published on 2008-08-06 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:realvnc:realvnc_windows_client:4.1.2.0:*:*:*:*:*:*:*

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