CVE-2026-44753Network attack vector

Unauthenticated account enumeration via response discrepancies

Published Jul 14, 2026 · Updated Jul 14, 2026

Observable response discrepancy in SAP HANA XS classic HDB 2.00 allows remote attackers to enumerate valid accounts and email addresses. The User Self-Service tools return distinguishable responses to specially crafted unauthenticated requests, revealing whether supplied account identifiers exist. User Self-Service must be enabled and network-reachable; the flaw discloses account existence and associated email addresses without changing data or interrupting service.

CVSS severity3.7
Low
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Observable response discrepancy in SAP HANA XS classic HDB 2.00 allows remote attackers to enumerate valid accounts and email addresses. The User Self-Service tools return distinguishable responses to specially crafted unauthenticated requests, revealing whether supplied account identifiers exist. User Self-Service must be enabled and network-reachable; the flaw discloses account existence and associated email addresses without changing data or interrupting service.

The record

CVE
CVE-2026-44753
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
cap-js
Product
SAP HANA Extended Application Services, classic model
Classifications
CWE-204, T1087
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=HDB 2.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

cap-js · SAP HANA Extended Application Services, classic modelversion=HDB 2.00

Published CVSS scores

3.7SAP SECVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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