Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated network attacker crash an SAP ABAP work process by sending oversized RFC request content. The affected process is expected to restart, so the published impact is limited availability disruption, not data theft or modification.
Executive priority
Treat as a scheduled SAP security maintenance item, with higher urgency for internet-exposed or broadly reachable RFC services. It is not documented as data-compromising or actively exploited in the provided sources.
Technical view
CVE-2021-33684 is a CWE-787 memory corruption flaw in SAP NetWeaver AS ABAP and ABAP Platform kernel handling of RFC request types. The CVSS 3.0 score is 5.3, with network attack vector, low complexity, no privileges, no user interaction, and low availability impact only.
Likely exposure
Exposure is most relevant where affected SAP NetWeaver AS ABAP or ABAP Platform kernel versions are reachable over networks that can send RFC traffic, especially from untrusted segments.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates remote, unauthenticated triggering is possible, but only availability impact is described.
Researcher notes
The affected version list is kernel-stream specific and should be validated against SAP Note 3032624. Available evidence describes crash behavior from overlong RFC request content and automatic work process restart, limiting impact to availability.
Mitigation direction
- Review SAP Note 3032624 for SAP-provided fixes or workarounds.
- Update affected SAP kernel components according to official SAP guidance.
- Restrict RFC access to trusted networks and required systems only.
- Monitor SAP work process crashes until remediation is confirmed.
Validation and detection
- Inventory SAP NetWeaver AS ABAP and ABAP Platform kernel versions.
- Compare installed kernel levels against CVE-2021-33684 and SAP Note 3032624.
- Confirm RFC services are not reachable from untrusted networks.
- Review SAP logs for repeated unexplained work process crashes.
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.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-33684 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
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506CVE reference · x_refsource_MISC
- https://launchpad.support.sap.com/#/notes/3032624CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.