CVE-2024-7399 is a path traversal vulnerability in Samsung MagicINFO 9 Server. CISA added it to the Known Exploited Vulnerabilities catalogue on 24 April 2026, which means attackers have used it in real attacks. Samsung MagicINFO 9 Server contains a path traversal vulnerability that could allow an attacker to write arbitrary files as system authority.
What the vulnerability means in practice
CVE-2024-7399 is a path traversal flaw in Samsung MagicINFO 9 Server that can let an attacker break out of intended file paths and write arbitrary files with system-level authority. That turns a web-facing bug into a server-compromise path, because file write primitives can alter application behaviour, plant web-accessible content, or tamper with system files.
Path traversal matters in products that process uploaded content, file paths, templates, or administrative workflows, because a single traversal primitive can cross trust boundaries and reach sensitive locations. For background on the underlying attack class, see Web Application Attacks Guide.
Why this vulnerability is dangerous
Arbitrary file write is especially dangerous when the server runs with high privilege, since the attacker may not need code execution first to change what the server loads, stores, or serves. In practice, that can lead to defacement, persistence, credential theft from local files, malicious configuration changes, or further exploitation of adjacent services.
Because CISA placed this CVE in the KEV catalogue, organisations should treat it as known-exploited rather than theoretical. For the authoritative vulnerability record and patch tracking, consult the NIST National Vulnerability Database and the CVE Program.
How organisations assess exposure and reduce attack surface
Exposure checks start with asset inventory: identify every MagicINFO 9 Server instance, confirm whether it is internet-facing, and compare installed build information against vendor and CISA guidance. Where the server is reachable from the public internet, the urgency rises because traversal bugs are easier to weaponise from anywhere on the network.
If immediate patching is not possible, limit exposure by reducing inbound access, restricting management interfaces, and tightening file-system permissions around the service account and writable directories. A mature prioritisation workflow should also use the Vulnerability Management Guide to align remediation with KEV status, asset criticality, and exception handling.
Detection, remediation, and identity impact
After remediation, organisations should review web logs, application logs, and file-system timestamps for evidence of traversal attempts, unexpected file creation, or changes to executable, script, or configuration paths. If exploitation is suspected, review the server for persistence mechanisms and any outbound connections or secondary payloads that followed the initial write.
Where a compromise may have exposed secrets, sessions, or service material stored on or near the server, rotate the affected credentials and validate that no attacker-controlled files remain. For real-world examples of how file-write and credential exposure can cascade into broader compromise, the State of NHI & AI Agent Breach Report 2026 and Gladinet Hard-Coded Keys RCE Exploitation show how exploited software often becomes a route to broader access and persistence.
Risk and Threat Considerations
A path traversal bug with arbitrary file write can move quickly from application weakness to host-level compromise, especially when the affected service runs with elevated privileges or can reach sensitive directories. Once attackers can write files reliably, they often pursue persistence, server-side tampering, or follow-on payload delivery rather than stopping at the initial exploit.
Failure mechanism: The attacker supplies a crafted path that escapes the intended directory, then uses the server’s own authority to write or replace files outside the allowed location.
Impact: The result can include malicious file planting, application takeover, defacement, credential exposure, or a foothold for deeper compromise of the host and surrounding environment.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack and risk surface, while NIST CSF 2.0, CIS Controls v8, NIST SP 800-53 Rev 5 and OWASP ASVS set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | ID.AM-01 — Asset Inventory | MagicINFO instances must be inventoried to assess KEV exposure and internet reachability. |
| Recommendation — Inventory every MagicINFO server and map where it is exposed. | ||
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | KEV-listed software flaws require prioritised discovery, remediation, and verification. |
| Recommendation — Prioritise and verify remediation for all exposed MagicINFO instances. | ||
| NIST SP 800-53 Rev 5 | SI-10 — Information Input Validation | Path traversal is prevented by validating and constraining file path inputs. |
| Recommendation — Validate path inputs and reject traversal sequences before file access. | ||
| OWASP ASVS | V5 File Handling — File Handling | ASVS file-handling requirements address traversal and unsafe file write conditions. |
| Recommendation — Apply file-handling controls that confine writes to approved directories. | ||
| MITRE ATT&CK | T1105 — Ingress Tool Transfer | Exploited servers are often used to drop or stage follow-on payloads after file write access. |
| Recommendation — Hunt for staged payload transfer after suspicious server-side writes. | ||
Practitioner Guidance
Why practitioners should care: This CVE is not just a generic web bug, it is a known-exploited server-side file write issue, so remediation should be treated as urgent and operationally verified rather than deferred to the next routine patch cycle.
What to watch for: Focus on unusual file creation, modified web assets, unexpected executable or script content, and any post-exploitation indicators that suggest the attacker used the write primitive to persist or pivot.
Practitioner takeaway: Validate the vendor fix, confirm the server’s exposure status, and assume the box may need compromise review if you find evidence of traversal attempts or unexpected file changes.