CVE-2020-10629Network attack vector

Unauthenticated file disclosure via external XML entities

Published Apr 9, 2020 · Updated Aug 4, 2024

XML external entity injection in Advantech WebAccess/NMS before 3.0.2 allows remote attackers to read sensitive files through crafted XML input. MibbrowserMibbrowserTrapAddAction passes attacker-controlled entity references to an XML parser that retrieves the referenced URI and embeds its contents in the processed document. Authentication is not required, and disclosed files are read with the WebAccess/NMS service's SYSTEM privileges; no integrity or availability impact is reported.

CVSS severity7.5
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XML external entity injection in Advantech WebAccess/NMS before 3.0.2 allows remote attackers to read sensitive files through crafted XML input. MibbrowserMibbrowserTrapAddAction passes attacker-controlled entity references to an XML parser that retrieves the referenced URI and embeds its contents in the processed document. Authentication is not required, and disclosed files are read with the WebAccess/NMS service's SYSTEM privileges; no integrity or availability impact is reported.

The record

CVE
CVE-2020-10629
Published
Apr 9, 2020
Updated
Aug 4, 2024
Vendor
Advantech
Product
WebAccess/NMS
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=Versions prior to 3.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Advantech · WebAccess/NMSversion=Versions prior to 3.0.2

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5CISA ICS-CERTCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

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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