CVE-2017-5566
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…
Does this matter?
Lower severity and a low EPSS score (0.62%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.0
- 6.7 MEDIUMCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.62% probability · 49th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-427
- Affected
- avg/anti-virus · avg/internet security · avg/ultimate
- Source
- cve@mitre.org
EPSS 0.6% since 28 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://cybellum.com/doubleagent-taking-full-control-antivirus/Third Party Advisory
- http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/Technical Description, Third Party Advisory
- http://www.securityfocus.com/bid/97022Third Party Advisory, VDB Entry
- http://cybellum.com/doubleagent-taking-full-control-antivirus/Third Party Advisory
- http://cybellum.com/doubleagentzero-day-code-injection-and-persistence-technique/Technical Description, Third Party Advisory
- http://www.securityfocus.com/bid/97022Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.