CVE-2021-1405
mediumpriority · track · 31EPSS 0.030 · 87 %ileEURUUSEPSS · scored 2026-10-27
A vulnerability in the email parsing module in Clam AntiVirus (ClamAV) Software version 0.103.1 and all prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper variable initialization that may result in an NULL pointer read. An attacker could exploit this vulnerability by sending a crafted email to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process crash, resulting in a denial of service condition.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (58)
Products and version ranges known to be affected.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (21)
External citations — patches, advisories, analysis.
- https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.htmlcnnvd
- https://lists.debian.org/debian-lts-announce/2021/04/msg00012.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2021-1405cnnvd
- https://packetstormsecurity.com/files/162121/Clam-AntiVirus-Toolkit-0.103.2.htmlcnnvd
- https://packetstormsecurity.com/files/162244/Ubuntu-Security-Notice-USN-4918-1.htmlcnnvd
- https://packetstormsecurity.com/files/162416/Gentoo-Linux-Security-Advisory-202104-07.htmlcnnvd
- https://security.gentoo.org/glsa/202104-07cnnvd
- https://vigilance.fr/vulnerability/ClamAV-NULL-pointer-dereference-via-Mail-Parser-35033cnnvd
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