How severe is CVE-2009-4556?

CVE-2009-4556 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2009-4556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4556?

CVE-2009-4556 primarily affects Quickheal Antivirus Plus 2009. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4556?

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

When was CVE-2009-4556 published?

CVE-2009-4556 was published on 2010-01-04 and last updated on 2026-06-16.

CVE-2009-4556

CVE-2009-4556 is a high-severity vulnerability in Quickheal Antivirus Plus 2009 with a CVSS 2.0 base score of 7.2. 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-264.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Quickheal Antivirus Plus 2009
Published: 2010-01-04
Last modified: 2026-06-16

Description

Quick Heal AntiVirus Plus 2009 10.00 SP1 and Quick Heal Total Security 2009 10.00 SP1 use weak permissions (Everyone: Full Control) for the product files, which allows local users to gain privileges by replacing executables with Trojan horse programs, as demonstrated by replacing quhlpsvc.exe.

Frequently asked questions

What is CVE-2009-4556?: Quick Heal AntiVirus Plus 2009 10.00 SP1 and Quick Heal Total Security 2009 10.00 SP1 use weak permissions (Everyone: Full Control) for the product files, which allows local users to gain privileges by replacing executables with Trojan horse programs, as demonstrated by replacing quhlpsvc.exe.
How severe is CVE-2009-4556?: CVE-2009-4556 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2009-4556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4556?: CVE-2009-4556 primarily affects Quickheal Antivirus Plus 2009. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-4556 published?: CVE-2009-4556 was published on 2010-01-04 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:quickheal:antivirus_plus_2009:10.00:sp1:*:*:*:*:*:*
cpe:2.3:a:quickheal:total_security_2009:10.00:sp1:*:*:*:*:*:*

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