CVE-2026-51821Public exploitNetwork attack vector

Database disclosure via unparameterized login query

Published Jul 13, 2026 · Updated Jul 13, 2026

SQL injection in Shenzhou Shihan Video Conference System 1.0 allows remote attackers to disclose database contents through its login endpoint. The /user/getUserLogin handler directly concatenates JSONPARAM.user_name into a MySQL query, and database errors expose query results. The endpoint requires no authentication, but each request needs a valid CAPTCHA; code execution depends on the database configuration.

CVSS severity9.8
Critical
EPSS probability0.77%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in Shenzhou Shihan Video Conference System 1.0 allows remote attackers to disclose database contents through its login endpoint. The /user/getUserLogin handler directly concatenates JSONPARAM.user_name into a MySQL query, and database errors expose query results. The endpoint requires no authentication, but each request needs a valid CAPTCHA; code execution depends on the database configuration.

The record

CVE
CVE-2026-51821
Published
Jul 13, 2026
Updated
Jul 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 13, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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