---
id: "CVE-2022-36537"
kind: "vulnerability"
aliases: ["CVE-2022-36537"]
title: "zkoss zk framework: ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attackers to access sensitive information via a\u2026"
severity: "high"
cvss: 7.5
epss: null
exploited: true
status: "open"
category: "package"
products: [{"name": "ZK Framework AuUploader", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "zkoss zk framework", "fixed": ["8.6.4.2"], "affected": "< 8.6.4.2", "ecosystem": "vendor"}, {"name": "zkoss zk framework", "fixed": ["9.0.1.3"], "affected": ">= 9.0.0, < 9.0.1.3", "ecosystem": "vendor"}, {"name": "zkoss zk framework", "fixed": ["9.5.1.3"], "affected": ">= 9.5.0, < 9.5.1.3", "ecosystem": "vendor"}, {"name": "zkoss zk framework", "fixed": ["9.6.2"], "affected": ">= 9.6.0, < 9.6.2", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["connectwise-r1soft", "exploited", "java", "package", "ransomware", "self-hosted", "zk-framework"]
not_affected_if: ["no-auuploader-servlet", "no-zk-framework"]
published_at: "2022-08-26T20:15:08+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-36537", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-36537", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# zkoss zk framework: ZK Framework v9.6.1, 9.6.0.1, 9.5.1.3, 9.0.1.2 and 8.6.4.1 allows attackers to access sensitive information via a…

The ZK Framework's AuUploader servlet has an unspecified flaw that lets an attacker read files from the web application's context. It is on CISA's known-exploited list, and ransomware use is reported in the tags.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:ZK Framework AuUploader affected ? fixed ?
- vendor:zkoss zk framework affected < 8.6.4.2 fixed 8.6.4.2
- vendor:zkoss zk framework affected >= 9.0.0, < 9.0.1.3 fixed 9.0.1.3
- vendor:zkoss zk framework affected >= 9.5.0, < 9.5.1.3 fixed 9.5.1.3
- vendor:zkoss zk framework affected >= 9.6.0, < 9.6.2 fixed 9.6.2

## How to check

Check whether your Java app depends on org.zkoss:zk and whether any ZK AuUploader servlet is deployed, for example in WEB-INF/web.xml or the app's lib directory.

## Fix

Apply the vendor update per CISA guidance; the sources do not give a fixed version.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-36537
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2022-36537

## From the sources

ZK Framework AuUploader servlets contain an unspecified vulnerability that could allow an attacker to retrieve the content of a file located in the web context. The ZK Framework is an open-source Java framework. This vulnerability can impact multiple products, including but not limited to ConnectWise R1Soft Server Backup Manager.

CISA required action: Apply updates per vendor instructions.

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