HOMEVULNERABILITIESCVE-2021-44747
MEDIUM

CVE-2021-44747

NVD-CWE-noinfoPublished: March 1, 2022· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official Description

A Denial-of-Service (DoS) vulnerability was discovered in F-Secure Linux Security whereby the Fmlib component used in certain F-Secure products can crash while scanning fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.

NVD Source

Technical Analysis

CVE-2021-44747 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

f-secure5 product(s)
atlantelements endpoint protectioninternet gatekeeperlinux securitysecurity cloud
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.f-secure.com/en/business/support-and-downloads/security-advisories
ADVISORYhttps://www.f-secure.com/en/business/support-and-downloads/security-advisories

All References (2)

→
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory
→
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory

Quick Facts

CVE IDCVE-2021-44747
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedMar 1, 2022

Related CVEs (NVD-CWE-noinfo)

CVE-2009-2543
10.0
CVE-2013-2422
10.0
CVE-2009-2452
10.0
CVE-2026-46798
10.0
CVE-2005-2222
10.0
CVE-2008-6546
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-44747 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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