# Legitimate Files Incorrectly Flagged as Malicious When Scanned with ICAP

**Product**: Anti-Virus  
**Version**: R81.20, R82, R82.10  
**Last Modified**: 2026-07-23

## Symptoms

- When using Internet Content Adaptation Protocol (ICAP) to scan files, the Anti‑Virus Blade flags multiple legitimate vendor files as malicious with the message `VIRUS FOUND`.
- Large files may cause ICAP to fail open or closed.
- Scans of password‑protected or encrypted ZIP files behave inconsistently.

## Cause

A change introduced in R81.20 Jumbo Hotfix Accumulator Take 113 modified ICAP error‑handling logic.

In specific scan‑error conditions, ICAP incorrectly classified the file as malicious instead of reporting a scan error, resulting in false detections.

## Solution

This problem was fixed. The fix is included in:

- [Jumbo Hotfix Accumulator for R82.10](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82.10/Default.htm) starting from Take 19
- [Jumbo Hotfix Accumulator for R82](https://sc1.checkpoint.com/documents/Jumbo_HFA/R82/Default.htm) starting from Take 103
- [Jumbo Hotfix Accumulator for R81.20](https://sc1.checkpoint.com/documents/Jumbo_HFA/R81.20/Default.htm) starting from Take 158

If you choose not to upgrade, Check Point can supply a **Hotfix**. [Contact Check Point Support](https://www.checkpoint.com/support-services/.contact-support/) to get a Hotfix for this issue.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing the Hotfix.

For faster resolution and verification, please collect [CPinfo files](http://supportcontent.checkpoint.com/solutions?id=sk92739) from the Security Management Server and Security Gateways involved in the case.

**Hotfix installation instructions:**

Refer to [sk168597 - How to install a Hotfix](https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solutionid=sk168597).

#### NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties

**Access Level**: General
**Status**: Approved by TAC  
**Date Created**: 2026-02-03  
**Last Modified**: 2026-07-23