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TI-2021-17758 Aliases CVE-2021-40833GHSA-34hg-pm9j-p7gx

Denial-of-service (DoS) in F-Secure endpoint protection products on Windows and Mac…

Priority LOW 25CWE-404Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

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.

Why it matters now

EPSS 0.00406 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
F-SecureF-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 AtlantAll Version—No fix listedCNA
  • 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 Atlant VendorF-Secure Affected All Version Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:f-secure:atlant:-:*:*:*:*:*:*:*not specified by NVDVulnerableF-Secure
cpe:2.3:a:f-secure:internet_gatekeeper:-:*:*:*:*:*:*:*not specified by NVDVulnerableF-Secure
cpe:2.3:a:f-secure:linux_security:-:*:*:*:*:*:x86:*not specified by NVDVulnerableF-Secure
cpe:2.3:a:f-secure:linux_security_64:-:*:*:*:*:*:*:*not specified by NVDVulnerableF-Secure
cpe:2.3:a:f-secure:elements_endpoint_protection:-:*:*:*:*:*:*:*not specified by NVDVulnerableF-Secure
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*not specified by NVDRunning onApple
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*not specified by NVDRunning onMicrosoft
  • cpe:2.3:a:f-secure:atlant:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·F-Secure
  • cpe:2.3:a:f-secure:internet_gatekeeper:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·F-Secure
  • cpe:2.3:a:f-secure:linux_security:-:*:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·F-Secure
  • cpe:2.3:a:f-secure:linux_security_64:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·F-Secure
  • cpe:2.3:a:f-secure:elements_endpoint_protection:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·F-Secure
  • cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Apple
  • cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40833
  2. 2026-10-03 Alias added: GHSA-34hg-pm9j-p7gx

References

Advisory 2

  • TI-2023-23465 Certain WithSecure products allow Denial of Service via the aepack archive unpack handler. CVSS 3.1HIGH 7.5
  • TI-2023-23463 Certain WithSecure products allow Denial of Service in the aeelf component. CVSS 3.1HIGH 7.5
  • TI-2023-23460 Certain WithSecure products allow Denial of Service (infinite loop). CVSS 3.1HIGH 7.5
  • TI-2023-23464 Certain WithSecure products allow Local privilege escalation via the lhz archive unpack… CVSS 3.1HIGH 7.8
  • TI-2023-26941 Certain WithSecure products allow a Denial of Service because there is an unpack handler… CVSS 3.1HIGH 7.5
  • TI-2023-23459 Certain WithSecure products allow Denial of Service via a fuzzed PE32 file. CVSS 3.1HIGH 7.5
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences