CVE-2026-8758Public exploitNetwork attack vector

Unauthenticated file upload via upload3.jsp File argument

Published May 17, 2026 · Updated May 17, 2026

Unrestricted file upload in Beijing Meite Software MetaCRM 6.4.0 Beta06 allows remote attackers to upload files through upload3.jsp. The /common/jsp/upload3.jsp handler accepts attacker-controlled File input without enforcing restrictions on dangerous file types. No authentication or user interaction is required; impact is established only as unauthorized file upload, not code execution.

CVSS severity7.3
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Beijing Meite Software MetaCRM 6.4.0 Beta06 allows remote attackers to upload files through upload3.jsp. The /common/jsp/upload3.jsp handler accepts attacker-controlled File input without enforcing restrictions on dangerous file types. No authentication or user interaction is required; impact is established only as unauthorized file upload, not code execution.

The record

CVE
CVE-2026-8758
Published
May 17, 2026
Updated
May 17, 2026
Vendor
Beijing Meite Software Technology Co., Ltd.
Product
MetaCRM
Classifications
CWE-284, CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2026CVE publishedPublication date reported by the CVE source.
  2. May 17, 2026Record 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=6.4.0 Beta06

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Beijing Meite Software Technology Co., Ltd. · MetaCRMversion=6.4.0 Beta06

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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