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 Protect
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.
- Published
- Nov 3, 2016
- Updated
- Jun 16, 2026
- EPSS
- 0.4% · 32th percentile
- CWE
- CWE-254
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| avast | business security | cpe:2.3:a:avast:business_security |
| avast | free antivirus | cpe:2.3:a:avast:free_antivirus |
| avast | internet security | cpe:2.3:a:avast:internet_security |
| avast | premier | cpe:2.3:a:avast:premier |
| avast | pro antivirus | cpe:2.3:a:avast:pro_antivirus |
| avast | email server security | cpe:2.3:a:avast:email_server_security |
| avast | endpoint protection | cpe:2.3:a:avast:endpoint_protection |
| avast | endpoint protection plus | cpe:2.3:a:avast:endpoint_protection_plus |
| avast | endpoint protection suite | cpe:2.3:a:avast:endpoint_protection_suite |
| avast | endpoint protection suite plus | cpe:2.3:a:avast:endpoint_protection_suite_plus |
| avast | file server security | cpe:2.3:a:avast:file_server_security |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- avast business security11.1.2241
- avast business security11.1.2245
- avast business security11.1.2253
- avast business security11.1.2260
- avast business security11.1.2261
- avast business security11.1.2262
- avast email server securityup to 8.0.1609 inclusive
- avast email server security8.0.1606
- avast endpoint protectionup to 8.0.1609 inclusive
- avast endpoint protection8.0.1606
- avast endpoint protection plus8.0.1606
- avast endpoint protection plus8.0.1609
- avast endpoint protection suiteup to 8.0.1609 inclusive
- avast endpoint protection suite8.0.1606
- avast endpoint protection suite plusup to 8.0.1609 inclusive
- avast endpoint protection suite plus8.0.1606
- avast file server securityup to 8.0.1609 inclusive
- avast file server security8.0.1606
- avast free antivirus11.1.2241
- avast free antivirus11.1.2245
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-254 · 7PK - Security FeaturesCVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.