CVE-2023-33987Network attack vector

Data access and interruption via request smuggling

Published Jul 11, 2023 · Updated Dec 4, 2024

HTTP request smuggling in SAP Web Dispatcher allows remote attackers to read or modify server data or temporarily interrupt service. Its front-end HTTP parser accepts crafted requests whose message boundaries the back-end server interprets differently, causing the smuggled payload to execute. No authentication is required, but exploitation can require several attempts and a front-end/back-end deployment; consequences are limited to server data access or modification and temporary unavailability.

CVSS severity8.6
High
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP request smuggling in SAP Web Dispatcher allows remote attackers to read or modify server data or temporarily interrupt service. Its front-end HTTP parser accepts crafted requests whose message boundaries the back-end server interprets differently, causing the smuggled payload to execute. No authentication is required, but exploitation can require several attempts and a front-end/back-end deployment; consequences are limited to server data access or modification and temporary unavailability.

The record

CVE
CVE-2023-33987
Published
Jul 11, 2023
Updated
Dec 4, 2024
Vendor
SAP SE
Product
SAP Web Dispatcher
Classifications
CWE-444, CAPEC-33, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=HDB 2.00
  2. Affected versionversion=KERNEL 7.49
  3. Affected versionversion=KERNEL 7.53
  4. Affected versionversion=KERNEL 7.54 KERNEL 7.77
  5. Affected versionversion=KERNEL 7.81
  6. Affected versionversion=KERNEL 7.85
  7. Affected versionversion=KERNEL 7.88
  8. Affected versionversion=KERNEL 7.89
  9. Affected versionversion=KERNEL 7.90
  10. Affected versionversion=KRNL64NUC 7.49
  11. Affected versionversion=KRNL64UC 7.49
  12. Affected versionversion=KRNL64UC 7.53
  13. Affected versionversion=SAP_EXTENDED_APP_SERVICES 1
  14. Affected versionversion=WEBDISP 7.49
  15. Affected versionversion=WEBDISP 7.53
  16. Affected versionversion=WEBDISP 7.54
  17. Affected versionversion=WEBDISP 7.77
  18. Affected versionversion=WEBDISP 7.81
  19. Affected versionversion=WEBDISP 7.85
  20. Affected versionversion=WEBDISP 7.88
  21. Affected versionversion=WEBDISP 7.89
  22. Affected versionversion=WEBDISP 7.90
  23. Affected versionversion=XS_ADVANCED_RUNTIME 1.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Web Dispatcherversion=HDB 2.00; version=KERNEL 7.49; version=KERNEL 7.53; version=KERNEL 7.54 KERNEL 7.77; version=KERNEL 7.81; version=KERNEL 7.85; version=KERNEL 7.88; version=KERNEL 7.89; version=KERNEL 7.90; version=KRNL64NUC 7.49; version=KRNL64UC 7.49; version=KRNL64UC 7.53; version=SAP_EXTENDED_APP_SERVICES 1; version=WEBDISP 7.49; version=WEBDISP 7.53; version=WEBDISP 7.54; version=WEBDISP 7.77; version=WEBDISP 7.81; version=WEBDISP 7.85; version=WEBDISP 7.88; version=WEBDISP 7.89; version=WEBDISP 7.90; version=XS_ADVANCED_RUNTIME 1.00

Published CVSS scores

9.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
8.6SAP SECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CAPEC-33HTTP Request Smuggling
T1190Exploit Public-Facing Application

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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