CVE-2021-33672Network attack vector

Remote code execution via unencoded chat messages

Published Sep 14, 2021 · Updated Aug 3, 2024

Cross-site scripting in SAP Contact Center before 700 allows remote attackers to execute operating-system commands via crafted chat messages. Communication Desktop renders an accepted chat message without encoding its attacker-controlled script content, and ActiveX extends script execution to OS commands. A recipient must accept the message; execution occurs with that recipient's privileges and can compromise data or interrupt the workstation.

CVSS severity9.6
Critical
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in SAP Contact Center before 700 allows remote attackers to execute operating-system commands via crafted chat messages. Communication Desktop renders an accepted chat message without encoding its attacker-controlled script content, and ActiveX extends script execution to OS commands. A recipient must accept the message; execution occurs with that recipient's privileges and can compromise data or interrupt the workstation.

The record

CVE
CVE-2021-33672
Published
Sep 14, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP Contact Center
Classifications
CWE-116, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2021CVE 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=< 700

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SAP SE · SAP Contact Centerversion=< 700

Published CVSS scores

9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C
9.6NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-116Improper Encoding or Escaping of Output
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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