CVE-2007-4521: Asterisk

Medium severity, CVSS 5.0. EPSS: 3% chance of exploitation in the next 30 days.

Asterisk Open Source 1.4.5 through 1.4.11, when configured to use an IMAP voicemail storage backend, allows remote attackers to cause a denial of service via an e-mail with an "invalid/corrupted" MIME body, which triggers a crash when the recipient listens to voicemail.

Affected products

• Asterisk Asterisk: version 1.4.5 only; version 1.4.6 only; version 1.4.7 only; version 1.4.8 only; version 1.4.9 only; version 1.4.10 only; …

Published 2007-08-28. Last modified 2026-06-16.