CVE-2021-47777Public exploitNetwork attack vector

Database read or modification via eidValue injection

Published Jan 15, 2026 · Updated Jan 15, 2026

SQL injection in RIB BuildSmart 21.0817 allows remote attackers to read or modify database data through the login validation endpoint. The endpoint incorporates the unauthenticated eidValue POST parameter into a Microsoft SQL Server statement without neutralizing SQL syntax, permitting stacked queries. No account or user interaction is required; the published proof of concept demonstrates control of query execution through a three-second server-side delay.

CVSS severity8.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in RIB BuildSmart 21.0817 allows remote attackers to read or modify database data through the login validation endpoint. The endpoint incorporates the unauthenticated eidValue POST parameter into a Microsoft SQL Server statement without neutralizing SQL syntax, permitting stacked queries. No account or user interaction is required; the published proof of concept demonstrates control of query execution through a three-second server-side delay.

The record

CVE
CVE-2021-47777
Published
Jan 15, 2026
Updated
Jan 15, 2026
Vendor
RIB Software
Product
RIB BuildSmart
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 15, 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=21.0817

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

RIB Software · RIB BuildSmartversion=21.0817

Published CVSS scores

8.2VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
8.8VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

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 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-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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