How severe is CVE-2006-1355?

CVE-2006-1355 has a CVSS 2.0 base score of 7.2, rated high severity.

Is CVE-2006-1355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-1355?

CVE-2006-1355 affects Alwil Avast Antivirus. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2006-1355?

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-2006-1355 published?

CVE-2006-1355 was published on 2006-03-22 and last updated on 2026-06-16.

CVE-2006-1355

CVE-2006-1355 is a high-severity vulnerability in Alwil Avast Antivirus 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.

Key facts

Severity: High (CVSS 2.0 base score 7.2)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Alwil Avast Antivirus
Published: 2006-03-22
Last modified: 2026-06-16

Description

avast! Antivirus 4.6.763 and earlier sets "BUILTIN\Everyone" permissions to critical system files in the installation folder, which allows local users to gain privileges or disable protection by modifying those files.

Frequently asked questions

What is CVE-2006-1355?: avast! Antivirus 4.6.763 and earlier sets "BUILTIN\Everyone" permissions to critical system files in the installation folder, which allows local users to gain privileges or disable protection by modifying those files.
How severe is CVE-2006-1355?: CVE-2006-1355 has a CVSS 2.0 base score of 7.2, rated high severity.
Is CVE-2006-1355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-1355?: CVE-2006-1355 affects Alwil Avast Antivirus. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-1355?: 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-2006-1355 published?: CVE-2006-1355 was published on 2006-03-22 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:alwil:avast_antivirus:*:*:*:*:*:*:*:*

More vulnerabilities in Alwil Avast Antivirus

CVE-2006-2869 — Critical (CVSS 10.0): Unspecified vulnerability in the CHM unpacker in avast! before 4.7.844 has unknown impact and remote attack vectors.
CVE-2006-4626 — High (CVSS 7.5): Heap-based buffer overflow in alwil avast! Anti-virus Engine before 4.7.869 allows remote attackers to execute…
CVE-2005-2385 — High (CVSS 7.5): Buffer overflow in a third-party compression library (UNACEV2.DLL), as used in avast! Antivirus Home/Professional…
CVE-2005-1719 — High (CVSS 7.5): Unknown vulnerability in ALWIL avast! antivirus 4 (4.6.6230) and earlier, when running on Windows NT 4.0, does not…
CVE-2005-1770 — High (CVSS 7.2): Buffer overflow in the Aavmker4 device driver in Avast! Antivirus 4.6 and possibly other versions allows local users to…
CVE-2005-3214 — Medium (CVSS 5.1): Multiple interpretation error in unspecified versions of Avast Antivirus allows remote attackers to bypass virus…

All CVEs affecting Alwil Avast Antivirus →