EUVD-2026-20960
GHSA-9vwp-gfwx-69j2
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessLocal attacker places crafted DLL in search path
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ExploitGatewayGeo MapServer loads malicious DLL during startup
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ExecutionArbitrary code executes with elevated privileges
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ImpactSystem compromise achieved
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A08:2025 - Software or Data Integrity Failures
ASVS 5.0
V13 - Configuration Search path element control
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| Exploitation Conditions | Attacker requires local access with low-privilege user account on Windows systems running GatewayGeo MapServer version 5. No user interaction needed. Exploits DLL search path vulnerability to load malicious library and escalate privileges to system/administrator level. |
| Impact | CVSS 8.8 reflects high-severity local privilege escalation on Windows via DLL injection. SSVC signals total technical impact with proof-of-concept availability. However, exploitation requires local access (authenticated user) and manual attack initiation. GatewayGeo MapServer's limited deployment scope moderates enterprise blast radius relative to critical infrastructure platforms. |
| Exploit ScenarioDerived | Authenticated local attacker executes crafted executable triggering DLL injection in GatewayGeo MapServer process, elevating privileges to system level. Publicly available exploit code exists per SSVC indicators and GitHub references, removing technical barriers for local exploitation. |
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Alert meAnalysisAIv1 – Apr 09, 2026
DLL injection in GatewayGeo MapServer for Windows version 5 enables authenticated local attackers to escalate privileges to SYSTEM level through crafted executable placement. The vulnerability exploits insecure library loading paths, allowing low-privileged users to inject malicious DLLs that execute with elevated permissions. Publicly available exploit code exists. Affects Windows deployments only; CVSS 8.8 reflects local attack vector requiring low privileges but achieving full system compromise across security boundaries.
RemediationAI
No vendor-released patch identified at time of analysis. Primary mitigation: restrict write permissions on application directories and system PATH locations to prevent unauthorized DLL placement by low-privileged accounts. Implement application whitelisting to block execution of unauthorized binaries in MapServer directories. Configure Windows to enforce Safe DLL Search Mode via registry. Monitor for suspicious DLL loads using Sysmon Event ID 7. Consider migrating to current MapServer 8.x branch if compatible, as version 5 represents legacy software unlikely to receive security updates. Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-30478. Organizations unable to apply controls should evaluate decommissioning MapServer 5 due to exploit code availability and absence of patching timeline.
Affected VersionsENISA
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Technical ContextAI · show details
CWE-427 uncontrolled search path element vulnerability. MapServer 5 for Windows fails to validate DLL load locations, enabling authenticated users to place malicious libraries in predictable search paths. Application loads attacker-controlled DLLs during execution, inheriting elevated process context and bypassing privilege boundaries.
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
A Dynamic-link Library Injection vulnerability in GatewayGeo MapServer for Windows version 5 allows attackers to escalate privileges via a crafted executable.
Executive ViewAI
GatewayGeo MapServer version 5 on Windows contains a local privilege escalation vulnerability (CVSS 8.8) that allows low-privileged users to gain SYSTEM-level access through DLL injection, potentially compromising entire server operations and connected infrastructure. Organizations running MapServer in Windows environments face immediate risk of unauthorized administrative access that could enable lateral movement, data exfiltration, and service disruption. This requires urgent inventory and containment actions given the public availability of exploit code.
No vendor-released patch identified at time of analysis. Interim mitigations: (1) Restrict local interactive logon privileges to MapServer servers-remove all non-essential local user accounts and enforce group policy to deny local logon rights; (2) Monitor DLL loading and process execution on MapServer hosts using endpoint detection and response (EDR) tools; (3) Apply filesystem access controls to MapServer installation directories, restricting write permissions to SYSTEM and Administrators only; (4) Run MapServer services under least-privilege dedicated service accounts rather than administrative contexts; (5) Isolate MapServer infrastructure on segmented networks to limit lateral movement potential.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
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