In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing the Logs\Update.log file with a symlink
Published Jul 18, 2019
4.4
MEDIUMCVSS 3.0
EPSS 0.54%
Description
In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing the Logs\Update.log file with a symlink. The next time the product attempts to write to the log file, the target of the symlink is renamed. This defect can be exploited to rename a critical product file (e.g., AvastSvc.exe), causing the product to fail to start on the next system restart.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
AV:L/AC:L/Au:N/C:N/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.54% (0.00543) | 43.63th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.54% (0.00543) | 44.51th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00044) | 13.18th | v3 (v2023.03.01) |
| Jun 9, 2024 | 0.04% (0.00044) | 12.69th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 10.67th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.40% (0.01404) | 49.02th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- http://www.mcerlane.co.uk/CVE-2019-11230/ x_refsource_MISCExploitThird Party Advisory
- http://www.securityfocus.com/bid/109344 vdb-entryx_refsource_BIDThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.mcerlane.co.uk/CVE-2019-11230/ | x_refsource_MISCExploitThird Party Advisory | |
| http://www.securityfocus.com/bid/109344 | vdb-entryx_refsource_BIDThird Party Advisory |
Change history (0)
No recorded changes yet.