CVE-2021-26626Network attack vector

Remote code execution via unchecked execBrowser filename

Published Apr 19, 2022 · Updated Aug 3, 2024

Improper input validation in TOBESOFT XPLATFORM before 9.2.2.280 allows remote attackers to execute arbitrary files on Windows. The execBrowser method in XPlatformLib922.dll passes its first argument unchecked to ShellExecuteW as the file to open when its second argument is default. Exploitation requires a user to interact with attacker-supplied content, after which the selected file runs with that user's privileges.

CVSS severity8.1
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in TOBESOFT XPLATFORM before 9.2.2.280 allows remote attackers to execute arbitrary files on Windows. The execBrowser method in XPlatformLib922.dll passes its first argument unchecked to ShellExecuteW as the file to open when its second argument is default. Exploitation requires a user to interact with attacker-supplied content, after which the selected file runs with that user's privileges.

The record

CVE
CVE-2021-26626
Published
Apr 19, 2022
Updated
Aug 3, 2024
Vendor
TOBESOFT
Product
XPLATFORM
Classifications
CWE-20, T1204
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 19, 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=unspecified <9.2.2.280

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TOBESOFT · XPLATFORMversion=unspecified <9.2.2.280

Published CVSS scores

8.1KrCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
5.1NIST NVDAV: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

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-20Improper Input Validation
T1204User 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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