Denial-of-service (DoS) in F-Secure endpoint protection products on Windows and Mac…
Priority LOW 25CWE-835Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-835.
Summary
A vulnerability affecting F-Secure Antivirus engine was discovered whereby scanning WIM archive file can lead to denial-of-service (infinite loop and freezes AV engine scanner). The vulnerability can be exploit remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.
Why it matters now
EPSS 0.00415 36th 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 Cloud Protection for Salesforce | 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 Cloud Protection for Salesforce VendorF-Secure Affected All Version Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:f-secure:atlant:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | F-Secure |
| cpe:2.3:a:f-secure:cloud_protection_for_salesforce:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | F-Secure |
| cpe:2.3:a:f-secure:linux_security:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | F-Secure |
| cpe:2.3:a:f-secure:elements_endpoint_protection:-:*:*:*:*:*:*:* | not specified by NVD | 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 not specified by NVD Vulnerable ·F-Secure
- cpe:2.3:a:f-secure:cloud_protection_for_salesforce:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·F-Secure
- cpe:2.3:a:f-secure:linux_security:-:*:*:*:*:*:*:* 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
- 2026-10-02 Threatist record created from CVE-2021-33599
- 2026-10-03 Alias added: GHSA-6f5f-78pr-p7q9
References
More F-Secure Atlant vulnerabilities
- 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
Sources
- CVE-2021-33599 · CVE Program
- CVE-2021-33599 · NVD
- FIRST EPSS
- GHSA-6f5f-78pr-p7q9 · GitHub Advisory Database · CC BY 4.0
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