CVE-2004-2771: n/a vulnerability

CVE-2004-2771: The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remo...

The expand function in fio.c in Heirloom mailx 12.5 and earlier and BSD mailx 8.1.2 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in an email address.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 01:36 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2004-2771 is an old mailx command-injection flaw. If a vulnerable mailx version processes a malicious email address, shell metacharacters in that address can cause arbitrary commands to run. Business urgency is highest where legacy Unix/Linux systems still use mailx in automated mail workflows. Exposure is most likely on legacy systems or distribution packages that still include vulnerable mailx variants, especially scripts, cron jobs, or services that pass untrusted email addresses to mailx. Treat as a legacy exposure cleanup with high impact potential. Prioritize internet-facing or automated mail-processing systems first, then remove or patch vulnerable mailx packages in older server images. Mitigation focus: Identify installed Heirloom mailx and BSD mailx versions across servers.; Apply relevant vendor updates from Debian, Red Hat, Oracle, or your platform vendor.; Replace vulnerable mailx packages where vendor updates are unavailable..

Prepared: Jun 14, 2026, 05:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Dec 24, 2014, 18:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=278748CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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