Security readout for executives and security teams
This vulnerability lets an authenticated user execute code on a BSCW Classic server by abusing archive extraction. The issue is serious because successful exploitation can affect the server itself, not just user data. The public record names fixed versions but does not provide CVSS, CWE, or active exploitation evidence. Exposure is most likely where BSCW Classic is deployed and authenticated users can submit or restore .bscw archives for extraction. The source bundle does not identify specific editions, hosting models, CPEs, or default feature exposure beyond BSCW Classic version status. Prioritize remediation for any internet-accessible or partner-facing BSCW Classic deployment. Authenticated RCE can become a business-impacting server compromise if a valid account is abused, although the bundle does not prove active exploitation or unauthenticated reachability. Mitigation focus: Upgrade BSCW Classic to the fixed release for the deployed branch.; Confirm whether 5.0.12, 5.1.10, 5.2.4, 7.3.3, or 7.4.3 applies.; Restrict archive import or extraction capability to trusted administrative users..
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
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-39271 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.bscw.de/en/company/CVE reference · x_refsource_MISC
- https://seclists.org/fulldisclosure/2021/Aug/24CVE 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.