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TI-2017-03572 Aliases CVE-2017-5566GHSA-q77f-m2hw-66xj

Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security…

Priority LOW 31CWE-427Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-427.

Summary

Code injection vulnerability in AVG Ultimate 17.1 (and earlier), AVG Internet Security 17.1 (and earlier), and AVG AntiVirus FREE 17.1 (and earlier) allows a local attacker to bypass a self-protection mechanism, inject arbitrary code, and take full control of any AVG process via a "DoubleAgent" attack. One perspective on this issue is that (1) these products do not use the Protected Processes feature, and therefore an attacker can enter an arbitrary Application Verifier Provider DLL under Image File Execution Options in the registry; (2) the self-protection mechanism is intended to block all local processes (regardless of privileges) from modifying Image File Execution Options for these products; and (3) this mechanism can be bypassed by an attacker who temporarily renames Image File Execution Options during the attack.

Why it matters now

EPSS 0.00618 49th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:avg:anti-virus:17.1:*:*:*:free:*:*:*17.1VulnerableAVG
cpe:2.3:a:avg:internet_security:17.1:*:*:*:*:*:*:*17.1VulnerableAVG
cpe:2.3:a:avg:ultimate:17.1:*:*:*:*:*:*:*17.1VulnerableAVG
  • cpe:2.3:a:avg:anti-virus:17.1:*:*:*:free:*:*:* Versions 17.1 Vulnerable ·AVG
  • cpe:2.3:a:avg:internet_security:17.1:*:*:*:*:*:*:* Versions 17.1 Vulnerable ·AVG
  • cpe:2.3:a:avg:ultimate:17.1:*:*:*:*:*:*:* Versions 17.1 Vulnerable ·AVG

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-5566
  2. 2026-10-03 Alias added: GHSA-q77f-m2hw-66xj

References

Advisory 2

  • TI-2019-12750 An issue was discovered in Avast antivirus before 19.8 and AVG antivirus before 19.8. CVSS 3.1HIGH 7.8
  • TI-2017-07336 AVG AntiVirus for MacOS with scan engine before 4668 might allow remote attackers to… CVSS 3.0HIGH 7.5
  • TI-2010-03328 AVG Anti-Virus does not properly interact with the processing of hcp:// URLs by the… CVSS 2.0MEDIUM 6.4
  • TI-2023-01496 Time-of-check time-of-use race condition in Avast Antivirus CVSS 3.1MEDIUM 6.5
  • TI-2019-13493 A Cross Site Scripting (XSS) issue exists in AVG AntiVirus (Internet Security Edition)… CVSS 3.1MEDIUM 6.1
  • TI-2023-01495 Time-of-check time-of-use race condition in Avast Antivirus CVSS 3.1MEDIUM 6.5
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences