Security readout for executives and security teams
Plain-English summary
CVE-2021-35573 is a denial-of-service flaw in Oracle Outside In Technology 8.5.5. If an application exposes Outside In processing to unauthenticated HTTP input, an attacker may cause hangs or repeatable crashes, disrupting availability. The evidence points to service outage risk, not data theft or code execution.
Executive priority
Prioritize this as high where Outside In 8.5.5 supports public or unauthenticated file-processing workflows. Business risk is availability disruption. If the SDK is absent, patched, or used only in offline workflows, urgency is lower after validation.
Technical view
The vulnerable component is Oracle Outside In Filters in Outside In Technology 8.5.5. Oracle rates it CVSS 7.5 with network attack vector, low complexity, no privileges, no user interaction, and high availability impact. Oracle notes actual protocol and score depend on how embedding software passes data to the SDK.
Likely exposure
Exposure is most likely in applications or products embedding Oracle Outside In Technology 8.5.5 and passing network-received HTTP content directly into the SDK, such as document viewing, filtering, or conversion workflows.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The CVE is described as easily exploitable by an unauthenticated network attacker via HTTP, but only in relevant embedding scenarios.
Researcher notes
The CVSS score assumes software passes network data directly to Outside In Technology. Oracle states impact and protocol can vary by embedding application. Sources identify availability impact only, with no confidentiality or integrity impact and no CWE listed in the bundle.
Mitigation direction
- Review Oracle October 2021 CPU guidance for Outside In Technology fixes.
- Inventory applications and vendor products using Outside In Technology 8.5.5.
- Prioritize remediation for internet-facing or unauthenticated document-processing paths.
- Reduce unauthenticated access to affected processing endpoints where feasible.
- Monitor affected services for repeated crashes, hangs, or availability degradation.
Validation and detection
- Confirm whether Outside In Technology 8.5.5 is present in your environment.
- Map which applications pass HTTP-received data into Outside In Filters.
- Verify current patch status against Oracle October 2021 CPU guidance.
- Check service logs for recurring hangs or crashes in document-processing paths.
- Record whether exposure is internet-facing, internal-only, or offline processing.
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-2021-35573 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.