CVE-2021-21470

Authenticated XXE via logging XML parser

Published Jan 12, 2021 · Updated Aug 3, 2024

XXE in SAP EPM Add-in for Microsoft Office before 1010 lets authenticated users affect integrity and availability via malicious XML. The logging service parses attacker-controlled configuration files without disabling XML external entities, allowing external-entity expansion during normal add-in processing. Exploitation requires an authenticated user with user privileges and a configuration-file path that accepts attacker-controlled XML; reported impact is limited to application integrity and availability.

CVSS severity4.4
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XXE in SAP EPM Add-in for Microsoft Office before 1010 lets authenticated users affect integrity and availability via malicious XML. The logging service parses attacker-controlled configuration files without disabling XML external entities, allowing external-entity expansion during normal add-in processing. Exploitation requires an authenticated user with user privileges and a configuration-file path that accepts attacker-controlled XML; reported impact is limited to application integrity and availability.

The record

CVE
CVE-2021-21470
Published
Jan 12, 2021
Updated
Aug 3, 2024
Vendor
SAP SE
Product
SAP EPM Add-in for Microsoft Office
Classifications
CWE-611, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 12, 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=< 1010
  2. Affected versionversion=< 2.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

SAP SE · SAP EPM Add-in for Microsoft Officeversion=< 1010; version=< 2.8

Published CVSS scores

4.4NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
3.6NVDAV:L/AC:L/Au:N/C:N/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
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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