Security readout for executives and security teams
Plain-English summary
This is a denial-of-service risk in Oracle Outside In Technology 8.5.5. If an exposed application sends HTTP-provided data directly into Outside In Filters, an unauthenticated attacker could make that component hang or crash repeatedly. The main business impact is service outage, not data theft or tampering.
Executive priority
Prioritize remediation for internet-facing or business-critical content processing systems. The issue is high severity because it can cause outages without authentication, but the provided evidence indicates availability impact only and no confirmed active exploitation.
Technical view
CVE-2021-35657 affects Oracle Outside In Technology, component Outside In Filters, version 8.5.5. CVSS 3.1 is 7.5 with network attack vector, low complexity, no privileges, no user interaction, and high availability impact only. Oracle notes Outside In is an SDK, so exposure and protocol depend on the embedding software.
Likely exposure
Likely exposure is limited to applications or third-party products embedding Oracle Outside In Technology 8.5.5, especially where untrusted HTTP data is passed directly to Outside In. General Oracle presence alone is not enough to confirm exposure.
Exploitation context
The supplied bundle does not show CISA KEV status or any cited evidence of active exploitation. Oracle describes the vulnerability as easily exploitable by an unauthenticated attacker with network access via HTTP, with denial of service as the stated outcome.
Researcher notes
The key research task is dependency discovery. Because Outside In is an SDK, affected deployments may be hidden inside products or custom services. The CVSS score assumes network-received data reaches Outside In directly; local-only or gated processing may reduce practical risk.
Mitigation direction
- Review Oracle October 2021 Critical Patch Update guidance and apply applicable Outside In fixes.
- Inventory applications and third-party products that embed Outside In Technology 8.5.5.
- Restrict public access to endpoints that parse untrusted files or content through Outside In.
- Ask vendors whether their products bundle affected Outside In SDK components.
- Monitor dependent services for repeated crashes, hangs, or availability degradation.
Validation and detection
- Confirm whether Outside In Technology 8.5.5 is installed or bundled in production applications.
- Map network-facing workflows that pass uploaded or HTTP-received content into Outside In Filters.
- Check Oracle CPU records and vendor advisories for applicable remediation status.
- Review availability logs for repeated parser crashes or hangs around content-processing requests.
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-2021-35657 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.