CVE-2026-28409Public exploitNetwork attack vector

Command execution via unsanitized backup filename

Published Feb 27, 2026 · Updated Feb 27, 2026

OS command injection in WeGIA before 3.6.5 allows remote attackers to execute arbitrary commands through database backup restoration. The config_funcoes.php restore function concatenates the uploaded filename into tar and mysql command strings and passes the combined string to shell_exec without neutralizing shell metacharacters. Restoration requires administrative access, but the published exploit chains an authentication bypass and runs commands as the www-data user.

CVSS severity10.0
Critical
EPSS probability3.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in WeGIA before 3.6.5 allows remote attackers to execute arbitrary commands through database backup restoration. The config_funcoes.php restore function concatenates the uploaded filename into tar and mysql command strings and passes the combined string to shell_exec without neutralizing shell metacharacters. Restoration requires administrative access, but the published exploit chains an authentication bypass and runs commands as the www-data user.

The record

CVE
CVE-2026-28409
Published
Feb 27, 2026
Updated
Feb 27, 2026
Vendor
LabReDeS - Laboratório de Redes, Desenvolvimento e Segurança
Product
WeGIA
Classifications
CWE-78, T1059.004, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 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=< 3.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LabReDeS - Laboratório de Redes, Desenvolvimento e Segurança · WeGIAversion=< 3.6.5

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
10.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell
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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