Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated remote user crash or hang software that uses Oracle Outside In Technology 8.5.5 to process network-supplied content. The reported impact is denial of service, not data theft or code execution. Business urgency depends on which exposed applications embed this SDK and whether they process untrusted HTTP input.
Executive priority
Treat this as a high-priority availability risk for exposed document-processing systems. It is less severe than a data breach flaw, but repeated crashes in critical workflows can disrupt operations and customer-facing services. Prioritize systems that process untrusted content over HTTP.
Technical view
CVE-2021-35659 affects Oracle Outside In Technology 8.5.5, specifically Outside In Filters. Oracle describes it as easily exploitable over HTTP without authentication when an embedding application passes network data directly into Outside In. CVSS 3.1 is 7.5, driven by high availability impact only.
Likely exposure
Exposure is most likely in applications, middleware, or products embedding Oracle Outside In Technology 8.5.5 for file or document filtering. Risk is higher when internet-facing or internal HTTP services pass untrusted uploaded or fetched content directly to the SDK.
Exploitation context
The source bundle does not show CISA KEV listing or evidence of active exploitation. Oracle states exploitation can be unauthenticated and network-accessible via HTTP in affected integration patterns, causing hangs or repeatable crashes. The protocol and severity may be lower if input is not network-sourced.
Researcher notes
The CVE is SDK-context dependent. Validate the embedding product, input path, and trust boundary before assigning full network CVSS. Public sources identify denial of service only, with no confidentiality or integrity impact and no confirmed active exploitation in the supplied bundle.
Mitigation direction
- Identify all products or services embedding Oracle Outside In Technology 8.5.5.
- Review Oracle October 2021 CPU and embedding-vendor guidance for applicable updates.
- Reduce network exposure to services processing untrusted content through Outside In.
- Add operational monitoring for repeated crashes or hangs in document-processing paths.
- Prioritize vendor-supported remediation for business-critical or internet-facing deployments.
Validation and detection
- Confirm whether Oracle Outside In Technology 8.5.5 is present in the environment.
- Trace whether HTTP-sourced data is passed directly into Outside In Filters.
- Inventory exposed upload, preview, indexing, or conversion workflows using the SDK.
- Review availability logs for repeated crashes or hangs around content processing.
- Check Oracle and product-vendor advisories for confirmed affected builds.
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-2021-35659 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.oracle.com/security-alerts/cpuoct2021.htmlCVE 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.