HOMEVULNERABILITIESCVE-2022-36537
HIGHCISA KEVIN THE WILD

CVE-2022-36537

Published: February 27, 2023

EPSS:93.94%probability of exploitation in 30 daysPercentile:99.9th

Official Description

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.

NVD Source

CISA KEV Advisory

ZK Framework AuUploader Unspecified Vulnerability

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.

Added to KEV: 2023-02-27Federal patch deadline: 2023-03-20⚠ USED IN RANSOMWARE CAMPAIGNS
Required Action (CISA)

Apply updates per vendor instructions.

Risk Analysis

An unspecified vulnerability in ZK Framework AuUploader servlets allows an attacker to retrieve sensitive file content from the web context. The high EPSS score of 0.93942 indicates a very high likelihood of exploitation, and its presence in CISA's KEV confirms active exploitation.

This vulnerability is actively being exploited in the wild. It is remotely exploitable.

Recommended Action

Apply the necessary updates for ZK Framework, especially if using products like ConnectWise R1Soft Server Backup Manager, to prevent unauthorized file retrieval.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-36537 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2022-36537 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.

Affected Vendors & Products

Mentioned vendors (from description):
Java
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

ACTIVE EXPLOITATIONConfirmed exploitation in the wild
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All References (2)

Quick Facts

CVE IDCVE-2022-36537
SeverityHIGH
CISA KEVYES — Active Exploitation
ExploitIN THE WILD
EPSS (30d)93.94%
PublishedFeb 27, 2023

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2022-36537 in threat intel feeds
  • Review IDS/IPS signatures for exploitation attempts
  • !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
  • !Active exploitation confirmed — treat as P1
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.