CVE-2020-25289

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-09-13 · updated 2026-06-17
Weakness: CWE-59

Description

The VPN service in AVAST SecureLine before 5.6.4982.470 allows local users to write to arbitrary files via an Object Manager symbolic link from the log directory (which has weak permissions).

Affected products

Avast Secureline Vpn: before 5.6.4982.470 — fixed in 5.6.4982.470

How to fix

Upgrade to a fixed version: Avast Secureline Vpn 5.6.4982.470. Check the vendor advisory for mitigations.

References

http://zeifan.my/security/arbitrary%20file/eop/2020/07/21/avast-secureline-vpn-arb-file-eop.html
http://zeifan.my/security/arbitrary%20file/eop/2020/07/21/avast-secureline-vpn-arb-file-eop.html

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