What is CVE-2017-9977?

CVE-2017-9977 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2017-07-12.

How severe is CVE-2017-9977?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apple macOS

CVE-2017-9977

AVG AntiVirus for MacOS with scan engine before 4668 might allow remote attackers to bypass malware detection by leveraging failure to scan inside disk image (aka DMG) files.

Published 2017-07-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.001

Affected products

References

wwws.nightwatchcybersecurity.com/2017/07/06/avg-antivirus-for-macos-doesnt-scan… (Third Party Advisory)

Frequently asked questions

What is CVE-2017-9977?: CVE-2017-9977 is a high-severity vulnerability in Apple macOS. CVSS score: 7.5/10. Published 2017-07-12.
How severe is CVE-2017-9977?: High severity. CVSS v3 base score is 7.5 out of 10.