CVE-2021-33683
Detail
Modified After Enrichment This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
SAP Web Dispatcher and Internet Communication Manager (ICM), versions - KRNL32NUC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL32UC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL64NUC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, KRNL64UC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, 7.53, 7.73, WEBDISP 7.53, 7.73, 7.77, 7.81, 7.82, 7.83, KERNEL 7.21, 7.22, 7.49, 7.53, 7.73, 7.77, 7.81, 7.82, 7.83, process invalid HTTP header. The incorrect handling of the invalid Transfer-Encoding header in a particular manner leads to a possibility of HTTP Request Smuggling attack. An attacker could exploit this vulnerability to bypass web application firewall protection, divert sensitive data such as customer requests, session credentials, etc.
Metrics
CVSS Version 4.0
CVSS Version 3.x
CVSS Version 2.0
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:N/AC:L/Au:S/C:N/I:P/A:N)
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Weakness Enumeration
CWE-ID
CWE Name
Source
CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
NIST
SAP SE
Change History
5 change records found show changes
CVE Modified by SAP SE
6/16/2026 11:55:01 PM
Action
Type
Old Value
New Value
Added
Affected
[{"vendor":"SAP SE","product":"SAP Web Dispatcher and Internet Communication Manager","versions":[{"version":"< KRNL32NUC 7.21","status":"affected"},{"version":"< 7.21EXT","status":"affected"},{"version":"< 7.22","status":"affected"},{"version":"< 7.22EXT","status":"affected"},{"version":"< KRNL32UC 7.21","status":"affected"},{"version":"< KRNL64NUC 7.21","status":"affected"},{"version":"< 7.49","status":"affected"},{"version":"< KRNL64UC 7.21","status":"affected"},{"version":"< 7.53","status":"affected"},{"version":"< 7.73","status":"affected"},{"version":"< WEBDISP 7.53","status":"affected"},{"version":"< 7.77","status":"affected"},{"version":"< 7.81","status":"affected"},{"version":"< 7.82","status":"affected"},{"version":"< 7.83","status":"affected"},{"version":"< KERNEL 7.21","status":"affected"}]}]
CVE Modified by CVE
11/21/2024 1:09:21 AM
Action
Type
Old Value
New Value
Added
Reference
https://launchpad.support.sap.com/#/notes/3000663
Added
Reference
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506
CVE Modified by SAP SE
5/14/2024 5:11:14 AM
Action
Type
Old Value
New Value
Reanalysis by NIST
9/28/2023 11:51:34 AM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.21ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.22:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.22ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.49:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.53:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.73:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.77:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.81:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.82:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:kernel_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl32nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl32uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl64nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl64uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:webdisp_7.53:*:*:*:*:*:*:*
OR
*cpe:2.3:a:sap:web_dispatcher:7.8_kernel_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.21ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.22:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.22ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.49:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.53:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.73:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.77:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.81:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:7.82:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:krnl32nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:krnl32uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:krnl64nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:krnl64uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher:webdisp_7.53:*:*:*:*:*:*:*
Added
CPE Configuration
OR
*cpe:2.3:a:sap:internet_communication_manager:7.21ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.22:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.22ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.49:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.53:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.73:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.77:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.81:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:7.82:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:kernel_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:krnl32nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:krnl32uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:krnl64nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:krnl64uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:internet_communication_manager:webdisp_7.53:*:*:*:*:*:*:*
Initial Analysis by NIST
7/27/2021 10:22:52 AM
Action
Type
Old Value
New Value
Added
CVSS V3.1
NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Added
CVSS V2
NIST (AV:N/AC:L/Au:S/C:N/I:P/A:N)
Added
CWE
NIST CWE-444
Added
CPE Configuration
OR
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.21ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.22:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.22ext:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.49:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.53:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.73:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.77:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.81:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:7.82:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:kernel_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl32nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl32uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl64nuc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:krnl64uc_7.21:*:*:*:*:*:*:*
*cpe:2.3:a:sap:web_dispatcher_and_internet_communication_manager:webdisp_7.53:*:*:*:*:*:*:*
Changed
Reference Type
https://launchpad.support.sap.com/#/notes/3000663 No Types Assigned
https://launchpad.support.sap.com/#/notes/3000663 Permissions Required
Changed
Reference Type
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506 No Types Assigned
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=580617506 Vendor Advisory
Quick Info
CVE Dictionary Entry: CVE-2021-33683 NVD
Published Date: 07/14/2021 NVD
Last Modified: 06/16/2026
Source: SAP SE
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