CVE Tools
Sign in

CVE-2021-40833

Denial-of-Service (DoS) Vulnerability

Published: Nov 26, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-404
NVD MITRE
5.5CVSSMEDIUM
EPSS Score
0.4%
Top 69.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A vulnerability affecting F-Secure antivirus engine was discovered whereby unpacking UPX file can lead to denial-of-service. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-404

Affected Products

F-Secure endpoint protection products on Windows and Mac. F-Secure Linux Security (32-bit) F-Secure Linux Security 64 F-Secure Internet Gatekeeper & F-Secure AtlantF-SecureSecurity Products
atlantf-secureSecurity Products
internet gatekeeperf-secureSecurity Products
linux securityf-secureSecurity Products
linux security 64f-secureSecurity Products
f-securecommercialFISecurity Productsaka fsecure, f-secure
and 1 more affected products View all →

Exploitability

Official Patch Available

References

https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame
f-secure.com
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40833
f-secure.com

Timeline

Published
Nov 26, 2021
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-40833 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows