Security readout for executives and security teams
Plain-English summary
This flaw can let an unauthenticated network attacker crash affected SAP ABAP dispatcher components, causing system unavailability. The sources state it does not allow viewing or modifying data. Business impact is service disruption for SAP environments, not confidentiality or integrity compromise.
Executive priority
Treat this as a high-priority availability risk for SAP environments supporting critical business processes. It is not described as a data theft issue, but a remotely triggerable crash could interrupt operations, transactions, or dependent workflows.
Technical view
CVE-2021-27607 affects SAP NetWeaver ABAP Server and ABAP Platform Dispatcher kernel lines listed in the CVE. Improper input validation in ThSncIn() can trigger an internal error and crash. CVSS 3.0 is 7.5: network-reachable, low complexity, no privileges, no user interaction, availability impact only.
Likely exposure
Exposure is most likely where affected SAP ABAP dispatcher/kernel versions are reachable over a network, especially from broader enterprise or untrusted segments. The provided data does not identify specific deployments, internet exposure, or cloud-managed variants.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is still operationally meaningful because exploitation requires no authentication and can cause denial of service, but the provided evidence limits impact to availability.
Researcher notes
The CVE maps to CWE-476 and describes improper input validation in ThSncIn(). Affected versions are kernel-specific and broad. Public evidence in the bundle does not provide exploit status, packet details, or exact fixed versions, so validation should rely on SAP Note 3021197 and local version evidence.
Mitigation direction
- Review SAP Note 3021197 and SAP security guidance for the official correction.
- Inventory SAP ABAP dispatcher and kernel versions against the affected version list.
- Prioritize remediation for network-reachable or business-critical SAP systems.
- Restrict dispatcher exposure to trusted networks where operationally possible.
- Monitor for unexpected dispatcher crashes, restarts, or availability incidents.
Validation and detection
- Confirm deployed SAP kernel and dispatcher versions are not in the affected list.
- Verify SAP vendor guidance or Note 3021197 has been applied where applicable.
- Check network paths to ensure only trusted sources can reach dispatcher services.
- Review SAP operational logs for dispatcher crashes or internal errors.
- Confirm availability monitoring alerts on affected SAP systems are active.
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-476: 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-2021-27607 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 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.5HighVector: CVSS:3.0/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://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999CVE reference
- https://launchpad.support.sap.com/#/notes/3021197CVE reference
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.