CVE-2023-26986Public exploit

Code execution via unescaped hyperlink parameters

Published Apr 10, 2023 · Updated Feb 11, 2025

Command injection in China Mobile OA Mailbox PC 2.9.23 allows remote attackers to execute arbitrary commands through a crafted EML file. When a recipient clicks an embedded malicious hyperlink, the client passes its unfiltered and unescaped parameters to ShellExecuteW. A mailbox recipient must open the message and click the link, after which attacker-supplied commands run on the victim host.

CVSS severity7.8
High
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in China Mobile OA Mailbox PC 2.9.23 allows remote attackers to execute arbitrary commands through a crafted EML file. When a recipient clicks an embedded malicious hyperlink, the client passes its unfiltered and unescaped parameters to ShellExecuteW. A mailbox recipient must open the message and click the link, after which attacker-supplied commands run on the victim host.

The record

CVE
CVE-2023-26986
Published
Apr 10, 2023
Updated
Feb 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1204.001, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS:3.1/AV:L/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1204.001User Execution: Malicious Link
T1203Exploitation for Client Execution

Public exploit references

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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