VULNERABILITY INTELLIGENCE

CVE-2021-3404

CVSS score7.8 HIGH

EPSS probability1.94%

CISA KEVNot currently listed

Published2021-03-04

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.

Weakness classification

secalert@redhat.com: CWE-119
nvd@nist.gov: CWE-787

Primary references

secalert@redhat.com — Issue Tracking, Third Party Advisory
secalert@redhat.com — Exploit, Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Issue Tracking, Third Party Advisory