Zero-Day Advisory

Fortinet Discovers AVG Self-Protection Bypass Vulnerability


Fortinet's FortiGuard Labs has discovered Security Bypass vulnerability in AVG.

When performing AV's update, AVG is reading some legacy registry entries that could lead to AVG file path hijacking, which could in turn allow adversaries to disable AV auto-update.


Users should apply the solution provided by AVG.

Additional Information

Following products and versions are affected.

  AVG Free Edition 16.101.7752 and below


Fortinet reported the vulnerability to AVG on August 9, 2016.

AVG confirmed the vulnerability on  August 13, 2016.


This vulnerability was discovered by Wayne Low of Fortinet's FortiGuard Labs.

IPS Subscription

Fortinet customers who subscribe to Fortinet's intrusion prevention (IPS) service should be protected against this vulnerability with the appropriate configuration parameters in place. Fortinet's IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by FortiGuard Labs, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat's lifecycle.