ShowDoc RCE Flaw CVE-2025-0520 Actively Exploited on Unpatched Servers

Tuesday, April 14, 2026 at 05:50 AM UTC·Source: The Hacker News

Updated: Tuesday, April 14, 2026 at 05:59 AM UTC

Executive Summary

A critical security vulnerability impacting ShowDoc, a document management and collaboration service popular in China, has come under active exploitation in the wild. The vulnerability in question is CVE-2025-0520 (aka CNVD-2020-26585), which carries a CVSS score of 9.4 out of 10.0. It relates to a case of unrestricted file upload that stems from improper validation of

Analysis

Indicators of Compromise (1)

CVE (1)

CVE-2025-0520

NVD MITRE CVE

Source Attribution

Originally published by The Hacker News on Apr 14, 2026.

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