CVE-2010-3126

CVE-2010-3126 is a critical-severity vulnerability in Avast Avast Antivirus Free with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Untrusted search path vulnerability in avast! Free Antivirus version 5.0.594 and earlier allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse mfc90loc.dll that is located in the same folder as an avast license (.avastlic) file.

Frequently asked questions

What is CVE-2010-3126?
Untrusted search path vulnerability in avast! Free Antivirus version 5.0.594 and earlier allows local users, and possibly remote attackers, to execute arbitrary code and conduct DLL hijacking attacks via a Trojan horse mfc90loc.dll that is located in the same folder as an avast license (.avastlic) file.
How severe is CVE-2010-3126?
CVE-2010-3126 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-3126 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3126?
CVE-2010-3126 affects Avast Avast Antivirus Free. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2010-3126?
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-2010-3126 published?
CVE-2010-3126 was published on 2010-08-26 and last updated on 2026-06-16.

References

Affected products (1)