4.4

CVE-2019-11230: avast antivirus Link Following

CVSS: 4.4v3.0MediumModified
Published 18-07-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-11230 is a medium (CVSS 4.4) Link Following vulnerability in avast antivirus. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
4.4/10
010
Medium · v3.0 (NVD)
EPSS score
0.54%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 18-07-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

+0.03 pp

From 0.51% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (mcerlane.co.uk)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Avast1 product

1 vendor · 1 product

References

2 links