---
id: CVE-1999-0163
title: >-
  In older versions of Sendmail, an attacker could use a pipe character to
  execute root commands.
summary: >-
  In older versions of Sendmail, an attacker could use a pipe character to
  execute root commands.
severity: high
cvss: 7.2
cvssVector: 'AV:L/AC:L/Au:N/C:C/I:C/A:C'
published: '1997-01-01'
updated: '2026-06-16'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-1999-0163'
references:
  - url: 'https://www.cve.org/CVERecord?id=CVE-1999-0163'
    label: cve@mitre.org
  - url: 'https://www.cve.org/CVERecord?id=CVE-1999-0163'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00437
epssPercentile: 0.37484
ingestedAt: '2026-06-22T15:59:08.152Z'
---

## Overview

In older versions of Sendmail, an attacker could use a pipe character to execute root commands.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.