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Case File

CVE-2021-44143

CRITICAL · CVSS 9.8 EPSS 3.66% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-22 · Last synced 2026-08-04

CyberRota Analysis

This is a critical severity vulnerability with a CVSS score of 9.8. Public exploit code or proof-of-concept references have been detected in its references. It may be remotely exploitable.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit remote code execution code execution

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-44143
Severity
CRITICAL
CVSS
9.8
EPSS
3.66%

Original NVD Description

A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.

Related CVEs

Other vulnerabilities affecting the same vendor(s)