Security readout for executives and security teams
Plain-English summary
This issue can make the F-Secure anti-virus scanning engine crash when it scans specially malformed files. The main business impact is degraded endpoint protection availability, not direct system takeover. The provided sources rate severity low and do not show active exploitation.
Executive priority
Handle through normal vulnerability management unless AV availability is critical to a high-risk workflow. The risk is operational disruption to malware scanning, with no cited evidence of active exploitation or broader compromise.
Technical view
CVE-2021-33597 affects the SAVAPI component used by certain F-Secure endpoint protection products on Windows, Mac, and Linux Security. The record describes a remotely triggerable crash while scanning fuzzed files. The supplied CVSS vector is 3.5, with network attack vector, low complexity, low privileges, and user interaction required.
Likely exposure
Exposure is most likely where F-Secure endpoint protection products use SAVAPI to scan untrusted files. The bundle lists “All Version” but does not provide precise version ranges, package names, or fixed releases.
Exploitation context
The source bundle does not cite CISA KEV listing, public exploitation, or exploit availability. It states remote triggering is possible, but the CVSS vector also indicates low privileges and user interaction are required. Treat exploitation evidence as incomplete.
Researcher notes
Key gaps are exact affected versions, fixed versions, and vendor remediation details. The description emphasizes denial of service, while the supplied CVSS vector records no availability impact, so analysts should verify scoring and vendor advisory context.
Mitigation direction
- Review F-Secure security advisories for CVE-2021-33597 remediation guidance.
- Confirm affected F-Secure products receive current vendor engine and product updates.
- Prioritize endpoints that scan untrusted email, web, or uploaded files.
- Monitor anti-virus engine crash, restart, and scan failure events.
- Escalate to F-Secure support if no product-specific fix is identifiable.
Validation and detection
- Inventory F-Secure endpoint protection deployments across Windows, Mac, and Linux Security.
- Identify whether deployed products use the SAVAPI component.
- Check vendor advisories for affected and fixed version details.
- Review endpoint logs for anti-virus engine crashes during file scanning.
- Verify monitoring alerts on AV service failure or repeated restarts.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-33597 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N2.11.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.5LowVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameCVE reference · x_refsource_MISC
- https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.