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CVE-2025-27821

CVE

Threat entity extracted from intelligence sources

Frequency
2
occurrences
First Seen
January 26, 2026
Last Seen
January 26, 2026
API
Exploited in Wild
—
Ransomware Use
—
Public Exploits
—
Attack Vector
—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical Apache Hadoop Vulnerability Allows Data Corruption and System Crashes29.9

A moderate-severity vulnerability in Apache Hadoop's HDFS native client could allow attackers to cause system crashes or corrupt data via malicious URI inputs. This flaw, tracked as CVE-2025-27821, affects versions 3.2.0 through 3.4.1 and is due to an out-of-bounds write issue in the URI parser.

Public Exploits

Checking GitHub for proof-of-concept code…

CVE Details

Related Entities

Apache HadoopHadoop Distributed File System (hdfs) Native Client