How severe is CVE-2020-25289?

CVE-2020-25289 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-25289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25289?

CVE-2020-25289 affects Avast Secureline Vpn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-25289?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-25289 published?

CVE-2020-25289 was published on 2020-09-13 and last updated on 2026-06-17.

CVE-2020-25289

CVE-2020-25289 is a medium-severity vulnerability in Avast Secureline Vpn with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-59.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-59
Affected product: Avast Secureline Vpn
Published: 2020-09-13
Last modified: 2026-06-17

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).

Frequently asked questions

What is CVE-2020-25289?: 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).
How severe is CVE-2020-25289?: CVE-2020-25289 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-25289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25289?: CVE-2020-25289 affects Avast Secureline Vpn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-25289?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-25289 published?: CVE-2020-25289 was published on 2020-09-13 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:avast:secureline_vpn:*:*:*:*:*:*:*:*

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