TI-2021-17761 Aliases CVE-2021-40836 GHSA-mvh9-66vv-hxxf

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

LOW 25Published 2021-12-22 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability affecting F-Secure antivirus engine was discovered whereby scanning MS outlook .pst files 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 0.00476 41st 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

Vendor	Product	Affected versions	Fixed in	Status	Source
F-Secure	F-Secure endpoint protection products on Windows and Mac. F-Secure Linux Security (32-bit) F-Secure Linux Security 64 F-Secure Atlant & F-Secure Internet Gatekeeper	All Version	—	No fix listed	CNA

F-Secure endpoint protection products on Windows and Mac. F-Secure Linux Security (32-bit) F-Secure Linux Security 64 F-Secure Atlant & F-Secure Internet Gatekeeper VendorF-Secure Affected All Version Fixed in — No fix listed CNA

CPE configurations NVD · 8

CPE	Versions	Role	Vendor
cpe:2.3:a:f-secure:atlant::::::::	all versions	Vulnerable	F-Secure
cpe:2.3:a:f-secure:internet_gatekeeper::::::::	all versions	Vulnerable	F-Secure
cpe:2.3:a:f-secure:linux_security:::::::x86:*	all versions	Vulnerable	F-Secure
cpe:2.3:a:f-secure:linux_security_64::::::::	all versions	Vulnerable	F-Secure
cpe:2.3:a:f-secure:elements_endpoint_detection_and_response::::::::	all versions	Vulnerable	F-Secure
cpe:2.3:a:f-secure:elements_endpoint_protection::::::::	all versions	Vulnerable	F-Secure
cpe:2.3:o:apple:macos:-:::::::*	not specified by NVD	Running on	Apple
cpe:2.3:o:microsoft:windows:-:::::::*	not specified by NVD	Running on	Microsoft

cpe:2.3:a:f-secure:atlant:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
cpe:2.3:a:f-secure:internet_gatekeeper:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
cpe:2.3:a:f-secure:linux_security:*:*:*:*:*:*:x86:* Versions all versions Vulnerable ·F-Secure
cpe:2.3:a:f-secure:linux_security_64:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
cpe:2.3:a:f-secure:elements_endpoint_detection_and_response:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
cpe:2.3:a:f-secure:elements_endpoint_protection:*:*:*:*:*:*:*:* Versions all versions 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

2026-10-02 Threatist record created from CVE-2021-40836
2026-10-03 Alias added: GHSA-mvh9-66vv-hxxf

References

Advisory 1

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

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