How severe is CVE-2008-4388?

CVE-2008-4388 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2008-4388 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4388?

CVE-2008-4388 affects Symantec Appstream Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2008-4388?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2008-4388 published?

CVE-2008-4388 was published on 2009-01-20 and last updated on 2026-06-16.

CVE-2008-4388

CVE-2008-4388 is a critical-severity vulnerability in Symantec Appstream Client with a CVSS 2.0 base score of 9.3. Its EPSS exploit-prediction score of 38% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 38% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Symantec Appstream Client
Published: 2009-01-20
Last modified: 2026-06-16

Description

The LaunchObj ActiveX control before 5.2.2.865 in launcher.dll in Symantec AppStream Client 5.2.x before 5.2.2 SP3 MP1 does not properly validate downloaded files, which allows remote attackers to execute arbitrary code via the installAppMgr method and unspecified other methods.

Frequently asked questions

What is CVE-2008-4388?: The LaunchObj ActiveX control before 5.2.2.865 in launcher.dll in Symantec AppStream Client 5.2.x before 5.2.2 SP3 MP1 does not properly validate downloaded files, which allows remote attackers to execute arbitrary code via the installAppMgr method and unspecified other methods.
How severe is CVE-2008-4388?: CVE-2008-4388 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2008-4388 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4388?: CVE-2008-4388 affects Symantec Appstream Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2008-4388?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2008-4388 published?: CVE-2008-4388 was published on 2009-01-20 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:symantec:appstream_client:5.2:*:*:*:*:*:*:*

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