CVE-2021-1252

highpriority · track · 31EPSS 0.025 · 85 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.52% (85th) EPSS

CVSS 7.8 · high

Is it mine?

60 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · fstec_bdu

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-835USprimaryCWE-20USCWE-20US

affected products (60)

Products and version ranges known to be affected.

Cisco clamav≤ 0.103.1enisa_euvdEU
Cisco clamav≤ 0.103.0enisa_euvdEU
Canonical Ltd. Ubuntu≤ 14.04 ESMfstec_bduRU
Canonical Ltd. Ubuntu≤ 18.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 16.04 LTSfstec_bduRU
Canonical Ltd. Ubuntu≤ 20.10fstec_bduRU
Novell Inc. HPE Helion Openstack≤ 8fstec_bduRU
Novell Inc. OpenSUSE Leap≤ 15.2fstec_bduRU
Novell Inc. SUSE CaaS Platform≤ 4.0fstec_bduRU
Novell Inc. SUSE Enterprise Storage≤ 6fstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP1-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15-ESPOSfstec_bduRU
Novell Inc. SUSE Linux Enterprise High Performance Computing≤ 15 SP1-ESPOSfstec_bduRU
Novell Inc. SUSE Linux Enterprise Module for Basesystem≤ 15 SP2fstec_bduRU
Novell Inc. SUSE Linux Enterprise Module for Basesystem≤ 15 SP3fstec_bduRU
Novell Inc. SUSE Linux Enterprise Point of Sale≤ 11 SP3fstec_bduRU
Novell Inc. SUSE Linux Enterprise Server for SAP Applications≤ 11 SP4-LTSSfstec_bduRU
Novell Inc. SUSE Linux Enterprise Server for SAP Applications≤ 12 SP3-BCLfstec_bduRU

showing 20 of 60

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu NVD CVE.org MITRE

published 2021-04-08modified 2026-06-17

related (1,376)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2024-20353US	high8.6OT critical	69.8% (99th)	KEV	2024-04-24
A vulnerability in the management and VPN web servers for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthen…
CVE-2020-13935US	high7.5	86.6% (100th)	Exploit	2020-07-14
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payl…
CVE-2014-0050US	high7.5	83.3% (100th)	Exploit	2014-04-01
MultipartStream.java in Apache Commons FileUpload before 1.3.1, as used in Apache Tomcat, JBoss Web, and other products, allows remote attackers to cause a denial of service (infin…
CVE-2021-21341US	high7.5	77.8% (100th)	Exploit	2021-03-23
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.16, there is vulnerability which may allow a remote attacker to allocate 100% CP…
CVE-2022-0778US	high7.5	73.2% (99th)	Exploit	2022-03-15
The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsi…

+1371 more

references (14)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan