HOMEVULNERABILITIESCVE-2021-33572
MEDIUM

CVE-2021-33572

CWE-476Published: June 21, 2021· 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 FSAVD component used in certain F-Secure products can crash while scanning larger packages/fuzzed files. The exploit can be triggered remotely by an attacker. A successful attack will result in Denial-of-Service (DoS) of the Anti-Virus engine.

NVD Source

Technical Analysis

CVE-2021-33572 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

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.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

f-secure4 product(s)
cloud protection for salesforceelements for microsoft 365endpoint protectionlinux security
Source: NVD CPE · 4 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 (4)

→
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameProduct
→
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory
→
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameProduct
→
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory

Quick Facts

CVE IDCVE-2021-33572
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
Affected1 vendor(s)
PublishedJun 21, 2021

Related CVEs (CWE-476)

CVE-2010-2495
10.0
CVE-2022-36648
10.0
CVE-2016-10344
9.8
CVE-2015-9043
9.8
CVE-2022-0582
9.8
CVE-2015-9073
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-33572 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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