What is the CVSS score of CVE-2016-4025?

CVE-2016-4025 has a CVSS 3.0 base score of 5.5 (Medium). CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.1%.

Avast CVE-2016-4025

MEDIUM

7PK - Security Features (CWE-254)

2016-11-03 cve@mitre.org

Authentication Bypass Internet Security Endpoint Protection Avast Business Security Free Antivirus Premier Pro Antivirus Email Server Security Endpoint Protection Plus Endpoint Protection Suite Endpoint Protection Suite Plus File Server Security

5.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-254
Impact	CVSS score of 5.5 (MEDIUM). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.06%.
Exploit ScenarioDerived	Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAI

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. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-254. 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. Affected products include: Avast Business Security, Avast Free Antivirus, Avast Internet Security, Avast Premier, Avast Pro Antivirus.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score

0.1%

Top 80% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +28

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

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:*:*:*:*:*:*:*

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Same weakness CWE-254 – 7PK - Security Features

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References

Advisories & patches

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

Search Externally

GitHub PoC

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