Security readout for executives and security teams
Plain-English summary
This issue can let an unauthenticated network attacker crash SAP NetWeaver ABAP or ABAP Platform Enqueue Server. It is an availability risk, not a data theft or data modification issue based on the provided record.
Executive priority
Treat as a high-priority availability issue for SAP environments supporting critical business processes. Prioritize systems reachable from broader networks or supporting revenue, finance, logistics, or identity workflows.
Technical view
CVE-2021-27632 is improper input validation in EnqConvUniToSrvReq(). A specially crafted network packet can trigger an internal error and crash the Enqueue Server. CVSS 7.5 reflects network reachability, low attack complexity, no privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is likely where affected SAP NetWeaver ABAP Server or ABAP Platform Enqueue Server kernel lines are reachable over a network, especially from untrusted segments.
Exploitation context
The bundle does not show CISA KEV listing or cited evidence of active exploitation. The vulnerability is remotely reachable without authentication, but the stated impact is denial of service only.
Researcher notes
Evidence identifies CWE-476 and an input-validation failure in EnqConvUniToSrvReq(). The public bundle does not provide exploit details, patch contents, or proof of exploitation, so validation should focus on version exposure, SAP Note status, and network reachability.
Mitigation direction
- Review SAP Security Note 3020104 for official remediation guidance.
- Inventory affected SAP kernel lines and prioritize vendor-recommended updates.
- Limit Enqueue Server network reachability to required trusted SAP components.
- Monitor availability of SAP systems that depend on Enqueue Server.
Validation and detection
- Confirm deployed SAP kernel versions against the affected version list.
- Check whether SAP Note 3020104 guidance has been applied.
- Review network paths to the Enqueue Server from untrusted segments.
- Look for unexplained Enqueue Server crashes or availability incidents.
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-2021-27632 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/3020104CVE 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.