Security readout for executives and security teams
Plain-English summary
This Oracle Database vulnerability matters mainly when an attacker already has powerful DBA access. From there, they could disrupt the RDBMS Security component and alter some security-accessible data. It is not described as enabling data theft, and it is not listed as known exploited in the provided sources.
Executive priority
Treat this as a moderate-priority database risk. It is not presented as remotely exploitable by ordinary users, but affected production databases should be patched through the normal Oracle security update process, with extra urgency where DBA access controls or network segmentation are weak.
Technical view
CVE-2021-35551 affects Oracle Database Enterprise Edition 12.2.0.1, 19c, and 21c in the RDBMS Security component. It is network-reachable through Oracle Net, low complexity, requires high privileges, and needs no user interaction. Reported impacts are low integrity impact and high availability impact, with no confidentiality impact.
Likely exposure
Exposure is most likely in environments running affected Oracle Database Enterprise Edition versions where Oracle Net is reachable and DBA-level accounts exist. The required DBA privilege substantially narrows attacker access, but compromise or misuse of privileged accounts could still create business disruption.
Exploitation context
The source bundle does not show active exploitation, and KEV status is false. Exploitation requires a high-privileged DBA attacker with network access through Oracle Net, making this more relevant to compromised administrator accounts, malicious insiders, or poorly controlled privileged access.
Researcher notes
No CWE is provided in the source bundle. The affected component, versions, CVSS vector, and impact statement come from Oracle/CVE sources. Available evidence does not include exploit details, precise fixed builds, or environmental prerequisites beyond DBA privilege and Oracle Net access.
Mitigation direction
- Review Oracle October 2021 Critical Patch Update guidance for CVE-2021-35551.
- Apply applicable Oracle security patches or vendor-supported remediation.
- Restrict Oracle Net access to trusted administrative networks.
- Review and minimize accounts with DBA privileges.
- Monitor for database hangs, repeated crashes, and unauthorized security data changes.
Validation and detection
- Inventory Oracle Database Enterprise Edition 12.2.0.1, 19c, and 21c instances.
- Compare database patch levels against Oracle CPU guidance.
- Confirm Oracle Net exposure is limited to approved sources.
- Audit active DBA accounts and privileged access controls.
- Review logs for repeated crashes or suspicious security data modifications.
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.
Database behavior lookup
The CVE wording references database injection or access, so collection and exfiltration review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-35551 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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:H/UI:N/S:U/C:N/I:L/A:H1.24.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/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.