CVE-2022-28773Network attack vector

Unauthenticated service crash via uncontrolled recursion

Published Apr 12, 2022 · Updated Aug 3, 2024

Uncontrolled recursion in SAP Web Dispatcher and Internet Communication Manager allows remote attackers to crash either server process. SAP has not published the request path or parser routine that recursively processes attacker-controlled input without a terminating bound. No authentication or user interaction is required; a crafted network request interrupts service until the process restarts automatically.

CVSS severity7.5
High
EPSS probability1.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in SAP Web Dispatcher and Internet Communication Manager allows remote attackers to crash either server process. SAP has not published the request path or parser routine that recursively processes attacker-controlled input without a terminating bound. No authentication or user interaction is required; a crafted network request interrupts service until the process restarts automatically.

The record

CVE
CVE-2022-28773
Published
Apr 12, 2022
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP Web Dispatcher
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=7.53
  2. Affected versionversion=7.77
  3. Affected versionversion=7.81
  4. Affected versionversion=7.85
  5. Affected versionversion=7.86

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Web Dispatcherversion=7.53; version=7.77; version=7.81; version=7.85; version=7.86
SAP SE · SAP Internet Communication Managerversion=7.22EXT; version=7.49; version=7.53; version=7.77; version=7.81; version=7.85; version=7.86; version=KERNEL 7.22; version=KRNL64NUC 7.22; version=KRNL64UC 7.22

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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-674Uncontrolled Recursion
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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