Denial-of-service (DoS) in F-Secure endpoint protection products on Windows and Mac…
Priority LOW 26Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
A vulnerability affecting the F-Secure Antivirus engine was discovered when the engine tries to unpack a zip archive (LZW decompression method), and this can crash the scanning engine. The vulnerability can be exploited remotely by an attacker. A successful attack will result in Denial-of-Service of the Anti-Virus engine.
Why it matters now
EPSS 0.00598 48th 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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:f-secure:atlant:*:*:*:*:*:*:*:* | all versions | Vulnerable | F-Secure |
| cpe:2.3:a:f-secure:cloud_protection:*:*:*:*:*:salesforce:*:* | 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:*:*:*:*:*:*:*:* | all versions | Vulnerable | F-Secure |
- cpe:2.3:a:f-secure:atlant:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
- cpe:2.3:a:f-secure:cloud_protection:*:*:*:*:*:salesforce:*:* 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:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·F-Secure
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33602
- 2026-10-03 Alias added: GHSA-cmvq-g5cv-ggqg
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-2021-33602 · CVE Program
- CVE-2021-33602 · NVD
- FIRST EPSS
- GHSA-cmvq-g5cv-ggqg · GitHub Advisory Database · CC BY 4.0
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