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Vulnerability details: VCID-xwgq-w8k4-xbcn
Vulnerability ID VCID-xwgq-w8k4-xbcn
Aliases CVE-2021-1252
Summary A vulnerability in the Excel XLM macro parsing module in Clam AntiVirus (ClamAV) Software versions 0.103.0 and 0.103.1 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. The vulnerability is due to improper error handling that may result in an infinite loop. An attacker could exploit this vulnerability by sending a crafted Excel file to an affected device. An exploit could allow the attacker to cause the ClamAV scanning process hang, resulting in a denial of service condition.
Status Published
Exploitability 0.5
Weighted Severity 3.8
Risk 1.9
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
epss 0.00539 https://api.first.org/data/v1/epss?cve=CVE-2021-1252
cvssv3.1 7.5 https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
ssvc Track https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
archlinux Low https://security.archlinux.org/AVG-1787
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-1252
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1252
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
986622 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986622
AVG-1787 https://security.archlinux.org/AVG-1787
clamav-01032-security-patch-release.html https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
USN-4918-1 https://usn.ubuntu.com/4918-1/
USN-4918-2 https://usn.ubuntu.com/4918-2/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2024-11-08T20:02:36Z/ Found at https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.67514
EPSS Score 0.00539
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:34:35.128673+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0