SAP Web Dispatcher/Internet Communication Manager up to 7.83 HTTP Header Transfer-Encoding request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in SAP Web Dispatcher and Internet Communication Manager up to 7.83. It has been declared as critical. Affected by this vulnerability is an unknown part of the component HTTP Header Handler. The manipulation of the argument Transfer-Encoding with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other device being aware of it. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 07/14/2021. The advisory is shared at This vulnerability is known as CVE-2021-33683. Technical details are known, but no exploit is available.

Applying a patch is able to eliminate this problem.





  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍


Class: Request smuggling
CWE: CWE-444
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Patch
Status: 🔍

0-Day Time: 🔍


05/28/2021 🔍
07/14/2021 +47 days 🔍
07/14/2021 +0 days 🔍
07/18/2021 +4 days 🔍



Status: Confirmed

CVE: CVE-2021-33683 (🔍)
scip Labs:


Created: 07/14/2021 07:01 PM
Updated: 07/18/2021 01:40 PM
Changes: 07/14/2021 07:01 PM (38), 07/18/2021 01:35 PM (2), 07/18/2021 01:40 PM (1)
Complete: 🔍


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