UBUNTU-CVE-2026-59781

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Source
https://ubuntu.com/security/CVE-2026-59781
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-59781
Upstream
  • CVE-2026-59781
Published
2026-08-18T13:17:00Z
Modified
2026-09-02T19:36:20Z
Severity
  • 5.4 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When Zabbix Agent was installed on Windows into a custom installation directory, the installer did not verify whether the selected directory had secure access permissions. If the target directory allowed unauthorized users to modify its contents, an attacker could place a malicious DLL that could later be loaded by the application, resulting in DLL sideloading. The installer has been hardened to detect potentially unsafe installation directories and now requires explicit user confirmation before proceeding with installation in such locations. This reduces the risk of accidental installation into directories with inappropriate permissions while preserving compatibility with existing deployment scenarios.

References

Affected packages

Ubuntu:26.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:7.*
1:7.0.10+dfsg-2build1
1:7.0.22+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-agent2",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-sender",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:7.0.22+dfsg-1"
        },
        {
            "binary_name": "zabbix-web-service",
            "binary_version": "1:7.0.22+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"
Ubuntu:Pro:14.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*
1:2.0.6+dfsg-1ubuntu2
1:2.2.0+dfsg-1ubuntu1
1:2.2.0+dfsg-6ubuntu1
1:2.2.1+dfsg-1ubuntu3
1:2.2.2+dfsg-1ubuntu1
1:2.2.2+dfsg-1ubuntu1+esm1
1:2.2.2+dfsg-1ubuntu1+esm3
1:2.2.2+dfsg-1ubuntu1+esm4
1:2.2.2+dfsg-1ubuntu1+esm5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:2.2.2+dfsg-1ubuntu1+esm5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"
Ubuntu:Pro:16.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*
1:2.4.6+dfsg-1
1:2.4.7+dfsg-1
1:2.4.7+dfsg-2
1:2.4.7+dfsg-2ubuntu2
1:2.4.7+dfsg-2ubuntu2.1
1:2.4.7+dfsg-2ubuntu2.1+esm1
1:2.4.7+dfsg-2ubuntu2.1+esm2
1:2.4.7+dfsg-2ubuntu2.1+esm3
1:2.4.7+dfsg-2ubuntu2.1+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:2.4.7+dfsg-2ubuntu2.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"
Ubuntu:Pro:18.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:3.*
1:3.0.7+dfsg-3
1:3.0.12+dfsg-1
1:3.0.12+dfsg-1ubuntu0.1~esm1
1:3.0.12+dfsg-1ubuntu0.1~esm2
1:3.0.12+dfsg-1ubuntu0.1~esm3
1:3.0.12+dfsg-1ubuntu0.1~esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:3.0.12+dfsg-1ubuntu0.1~esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"
Ubuntu:Pro:20.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:4.*
1:4.0.4+dfsg-1build2
1:4.0.4+dfsg-1build3
1:4.0.11+dfsg-1
1:4.0.14+dfsg-1
1:4.0.15+dfsg-1
1:4.0.16+dfsg-1
1:4.0.16+dfsg-1build1
1:4.0.17+dfsg-1
1:4.0.17+dfsg-1ubuntu0.1~esm1
1:4.0.17+dfsg-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:4.0.17+dfsg-1ubuntu0.1~esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"
Ubuntu:Pro:22.04:LTS
zabbix

Package

Name
zabbix
Purl
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:5.*
1:5.0.8+dfsg-1build1
1:5.0.14+dfsg-1
1:5.0.17+dfsg-1
1:5.0.17+dfsg-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "zabbix-agent",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-frontend-php",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-java-gateway",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-mysql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-pgsql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-proxy-sqlite3",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-server-mysql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "zabbix-server-pgsql",
            "binary_version": "1:5.0.17+dfsg-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59781.json"