CVE-2016-4025

CVE-2016-4025 is a medium-severity vulnerability in Avast Business Security 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-254.

Key facts

• Severity: Medium (CVSS 3.x base score 5.5)
• CVSS v2: 2.1
• EPSS exploit prediction: 0% (31st percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-254
• Affected product: Avast Business Security
• Published: 2016-11-03
• Last modified: 2026-06-17

Description

Avast Internet Security v11.x.x, Pro Antivirus v11.x.x, Premier v11.x.x, Free Antivirus v11.x.x, Business Security v11.x.x, Endpoint Protection v8.x.x, Endpoint Protection Plus v8.x.x, Endpoint Protection Suite v8.x.x, Endpoint Protection Suite Plus v8.x.x, File Server Security v8.x.x, and Email Server Security v8.x.x allow attackers to bypass the DeepScreen feature via a DeviceIoControl call.

Frequently asked questions

What is CVE-2016-4025?

Avast Internet Security v11.x.x, Pro Antivirus v11.x.x, Premier v11.x.x, Free Antivirus v11.x.x, Business Security v11.x.x, Endpoint Protection v8.x.x, Endpoint Protection Plus v8.x.x, Endpoint Protection Suite v8.x.x, Endpoint Protection Suite Plus v8.x.x, File Server Security v8.x.x, and Email Server Security v8.x.x allow attackers to bypass the DeepScreen feature via a DeviceIoControl call.

How severe is CVE-2016-4025?

CVE-2016-4025 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-2016-4025 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-4025?

CVE-2016-4025 primarily affects Avast Business Security. In total, 42 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-4025?

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

When was CVE-2016-4025 published?

CVE-2016-4025 was published on 2016-11-03 and last updated on 2026-06-17.

References

• https://labs.nettitude.com/blog/escaping-avast-sandbox-using-single-ioctl-cve-2016-4025/

Affected products (42)

• cpe:2.3:a:avast:business_security:11.1.2241:*:*:*:*:*:*:*
• cpe:2.3:a:avast:business_security:11.1.2245:*:*:*:*:*:*:*
• cpe:2.3:a:avast:business_security:11.1.2253:*:*:*:*:*:*:*
• cpe:2.3:a:avast:business_security:11.1.2260:*:*:*:*:*:*:*
• cpe:2.3:a:avast:business_security:11.1.2261:*:*:*:*:*:*:*
• cpe:2.3:a:avast:business_security:11.1.2262:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2241:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2245:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2253:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2260:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2261:*:*:*:*:*:*:*
• cpe:2.3:a:avast:free_antivirus:11.1.2262:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2241:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2245:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2253:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2260:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2261:*:*:*:*:*:*:*
• cpe:2.3:a:avast:internet_security:11.1.2262:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2241:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2245:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2253:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2260:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2261:*:*:*:*:*:*:*
• cpe:2.3:a:avast:premier:11.1.2262:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2241:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2245:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2253:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2260:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2261:*:*:*:*:*:*:*
• cpe:2.3:a:avast:pro_antivirus:11.1.2262:*:*:*:*:*:*:*
• cpe:2.3:a:avast:email_server_security:*:*:*:*:*:*:*:*
• cpe:2.3:a:avast:email_server_security:8.0.1606:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection:*:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection:8.0.1606:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_plus:8.0.1606:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_plus:8.0.1609:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_suite:*:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_suite:8.0.1606:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_suite_plus:*:*:*:*:*:*:*:*
• cpe:2.3:a:avast:endpoint_protection_suite_plus:8.0.1606:*:*:*:*:*:*:*

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