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Vulnerability record · CVE-2021-38162 · published 14 September 2021

CVE-2021-38162: Sap web dispatcher http request smuggling vulnerability

Sap · Web Dispatcher

SAP Web Dispatcher versions - 7.49, 7.53, 7.77, 7.81, KRNL64NUC - 7.22, 7.22EXT, 7.49, KRNL64UC -7.22, 7.22EXT, 7.49, 7.53, KERNEL - 7.22, 7.49, 7.53, 7.77, 7.81, 7.83 processes allow an unauthenticated attacker to submit a malicious crafted request over a network to a front-end server which may, over several attempts, result in a back-end server confusing the boundaries of malicious and legitimate messages. This can result in the back-end server executing a malicious payload which can be used to read or modify any information on the server or consume server resources making it temporarily unavailable.

9.4 CVSS 3.1 Critical EPSS 2.7% · top 14.4% CWE-444 · HTTP request smuggling
9.4CVSS 3.1 base score, v2 7.5
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

SAP Web Dispatcher versions - 7.49, 7.53, 7.77, 7.81, KRNL64NUC - 7.22, 7.22EXT, 7.49, KRNL64UC -7.22, 7.22EXT, 7.49, 7.53, KERNEL - 7.22, 7.49, 7.53, 7.77, 7.81, 7.83 processes allow an unauthenticated attacker to submit a malicious crafted request over a network to a front-end server which may, over several attempts, result in a back-end server confusing the boundaries of malicious and legitimate messages. This can result in the back-end server executing a malicious payload which can be used to read or modify any information on the server or consume server resources making it temporarily unavailable.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/166964/SAP-Web-Dispatcher-HTTP-Request-Smuggling.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2022/May/3 ExploitMailing ListThird Party Advisory
https://launchpad.support.sap.com/#/notes/3080567 Permissions Required
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=585106405 Vendor Advisory
http://packetstormsecurity.com/files/166964/SAP-Web-Dispatcher-HTTP-Request-Smuggling.html ExploitThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2022/May/3 ExploitMailing ListThird Party Advisory
https://launchpad.support.sap.com/#/notes/3080567 Permissions Required
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=585106405 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2022-22536SAP NetWeaver and Web Dispatcher HTTP request smugglingSAP NetWeaver Application Server ABAP, NetWeaver Application Server Java, ABAP Platform, Content Server 7.53 and Web Dispatcher mishandle HTTP reques…KEVEPSS 98%analysed9.8CVE-2023-40309Sap commoncryptolib incorrect authorization vulnerabilitySAP CommonCryptoLib does not perform necessary authentication checks, which may result in missing or wrong authorization checks for an authenticated …EPSS 0.88%9.4CVE-2023-33987Sap web dispatcher http request smuggling vulnerabilityAn unauthenticated attacker in SAP Web Dispatcher - versions WEBDISP 7.49, WEBDISP 7.53, WEBDISP 7.54, WEBDISP 7.77, WEBDISP 7.81, WEBDISP 7.85, WEBD…EPSS 0.69%9.4CVE-2023-35871Sap web dispatcher out-of-bounds write vulnerabilityThe SAP Web Dispatcher - versions WEBDISP 7.53, WEBDISP 7.54, WEBDISP 7.77, WEBDISP 7.85, WEBDISP 7.89, WEBDISP 7.91, WEBDISP 7.92, WEBDISP 7.93, KER…EPSS 0.60%7.5CVE-2023-40308Sap commoncryptolib out-of-bounds write vulnerabilitySAP CommonCryptoLib allows an unauthenticated attacker to craft a request, which when submitted to an open port causes a memory corruption error in a…EPSS 0.75%7.5CVE-2022-28772Sap netweaver stack-based buffer overflow vulnerabilityBy overlong input values an attacker may force overwrite of the internal program stack in SAP Web Dispatcher - versions 7.53, 7.77, 7.81, 7.85, 7.86,…EPSS 1.4%7.5CVE-2022-28773Sap netweaver vulnerabilityDue to an uncontrolled recursion in SAP Web Dispatcher and SAP Internet Communication Manager, the application may crash, leading to denial of servic…EPSS 1.5%6.3CVE-2024-33005Sap netweaver abap missing authorization vulnerabilityDue to the missing authorization checks in the local systems, the admin users of SAP Web Dispatcher, SAP NetWeaver Application Server (ABAP and Java)…EPSS 0.21%

Source: NIST National Vulnerability Database (record CVE-2021-38162), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.