CVE-2020-5601Network attack vector

Arbitrary command execution via manipulated COM objects

Published Jun 30, 2020 · Updated Aug 4, 2024

Command execution in National Tax Agency Japan e-Tax AP 1.0.0.0 allows remote attackers to execute arbitrary commands via crafted parameters. The extension accepts an attacker-crafted parameter and uses it to manipulate COM objects, causing the host to execute the resulting command. Exploitation requires user interaction with the Chrome or Chromium-based Edge extension; the public advisory does not identify the delivery vector or affected COM object.

CVSS severity8.8
High
EPSS probability1.59%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command execution in National Tax Agency Japan e-Tax AP 1.0.0.0 allows remote attackers to execute arbitrary commands via crafted parameters. The extension accepts an attacker-crafted parameter and uses it to manipulate COM objects, causing the host to execute the resulting command. Exploitation requires user interaction with the Chrome or Chromium-based Edge extension; the public advisory does not identify the delivery vector or affected COM object.

The record

CVE
CVE-2020-5601
Published
Jun 30, 2020
Updated
Aug 4, 2024
Vendor
National Tax Agency Japan
Product
e-Tax AP
Classifications
CWE-77, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 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=Ver1.0.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

National Tax Agency Japan · e-Tax APversion=Ver1.0.0.0

Published CVSS scores

5.0JPCERT/CC and IPACVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
5.1JPCERT/CC and IPAAV:N/AC:H/Au:N/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/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 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-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1203Exploitation for Client Execution

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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