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CVE Record

CVE-2021-27621: Information Disclosure vulnerability in UserAdmin application in SAP NetWeaver Application Server for Java,...

Information Disclosure vulnerability in UserAdmin application in SAP NetWeaver Application Server for Java, versions - 7.11,7.20,7.30,7.31,7.40 and 7.50 allows attackers to access restricted information by entering malicious server name.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2021-27621 is an information disclosure issue in SAP NetWeaver AS for Java's UserAdmin application. A highly privileged attacker could use malicious server-name input to access restricted information. The business risk is moderate because exploitation needs high privileges, but affected SAP systems often contain sensitive administrative context.

Executive priority

Treat as a scheduled SAP security update unless the affected UserAdmin interface is broadly reachable or privileged accounts are weakly controlled. Prioritize validation in environments handling regulated, financial, or customer data.

Technical view

The CVE affects SAP NetWeaver AS for Java UserAdmin versions 7.11, 7.20, 7.30, 7.31, 7.40, and 7.50. CVSS 3.0 is 5.5: network reachable, low complexity, high privileges required, no user interaction, changed scope, low confidentiality and integrity impact, no availability impact.

Likely exposure

Exposure is most likely where SAP NetWeaver AS for Java UserAdmin is present on the listed versions and reachable by administrators or internal users. Risk rises if high-privilege SAP accounts are broadly assigned, shared, or exposed through compromised workstations.

Exploitation context

The provided sources do not show active exploitation, and CISA KEV is false. The CVSS vector indicates exploitation requires high privileges but no user interaction. The source bundle does not provide exploit details, affected patch levels, or evidence of public weaponization.

Researcher notes

Evidence is limited to the CVE record and SAP references. The vulnerability is described as restricted information access through malicious server-name input, but the bundle does not specify data types exposed, exact vulnerable patch levels, or remediation mechanics.

Mitigation direction

  • Review SAP Note 3023299 and apply the vendor-recommended correction if applicable.
  • Restrict UserAdmin access to trusted administrative networks and accounts.
  • Reduce high-privilege SAP account assignments to documented operational need.
  • Monitor SAP advisory channels for updated guidance on this CVE.

Validation and detection

  • Inventory SAP NetWeaver AS for Java systems and confirm UserAdmin presence.
  • Compare installed versions and patch levels against SAP Note 3023299.
  • Review administrative access paths to ensure UserAdmin is not broadly reachable.
  • Check logs for unusual UserAdmin activity by high-privilege accounts.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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.

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CVE-2021-27621 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

5.5Medium
CVSS 3.0 vector shape for CVE-2021-27621Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
SAP SESAP NetWeaver AS for Java (UserAdmin)< 7.11, < 7.20, < 7.30, < 7.31, < 7.40, < 7.50Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.