Cyber Resilience

CVE-2024-28520

Published
04 April 2024
Modified
17 June 2026
CVSS Score v3.1 6.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0017 7th percentile
Risk Priority 48 floored blend · peak EPSS

Summary

CVE-2024-28520 is a medium-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability. Its CVSS base score is 6.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SI-3 (Malicious Code Protection) and CM-7 (Least Functionality) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A06:2025 Insecure Design

EU & UK References

Vulnerability Data

File Upload vulnerability in Byzoro Networks Smart multi-service security gateway intelligent management platform version S210, allows an attacker to obtain sensitive information via the uploadfile.php component.

CWE(s)
CWE-434CWE-616

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1505 Server Software Component Persistence
Adversaries may abuse legitimate extensible development features of servers to establish persistent access to systems.
attack.mitre.org →
T1505.003 Web Shell Persistence
Adversaries may backdoor web servers with web shells to establish persistent access to systems.
attack.mitre.org →
T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1105 Ingress Tool Transfer Command And Control
Adversaries may transfer tools or other files from an external system into a compromised environment.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2026-22789Shared CWE-434, CWE-616
CVE-2023-38947Shared CWE-434, CWE-616
CVE-2023-31946Shared CWE-434
CVE-2023-25922Shared CWE-434
CVE-2024-49216Shared CWE-434
CVE-2025-8297Shared CWE-434
CVE-2024-35080Shared CWE-434
CVE-2021-30118Shared CWE-434
CVE-2024-29514Shared CWE-434
CVE-2023-3274Shared CWE-434

Affected Assets

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.1.1

Mitigating Controls (NIST 800-53 r5) AI

SI-3 Malicious Code Protection good match

Malicious-code protection at entry points blocks dangerous file types from being accepted and executed.

CM-7 Least Functionality partial match

Least functionality restricts the file types and automatic processing capabilities the system will accept.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles such as complete mediation and least privilege require the use of the canonical $_FILES array rather than attacker-writable globals.

SC-18 Mobile Code partial match

Mobile-code controls define, authorize, and block unacceptable uploaded code before automatic processing occurs.

SI-10 Information Input Validation partial match

Proper validation of all file-upload inputs stops attackers from supplying or overwriting the legacy global variables that the flawed code relies on.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-05 mostly match
prevents

Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly prevent use of the deprecated PHP upload globals and variable-overwrite flaws.

PR.PS-01 partial match
prevents

Hardened configuration baselines can enforce allowed file types and processing rules.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Configuration and acceptance testing verify that file-upload handling enforces allowed types and does not permit dangerous content to be stored or executed.

A.8.25 Secure development life cycle partial match
prevents

Secure-coding guidelines and security testing explicitly address restrictions on allowed file types and upload handling, reducing the risk that dangerous file uploads are accepted without validation.

A.8.26 Application security requirements partial match
prevents

Application security requirements include secure file-upload mechanisms that eliminate reliance on the four legacy PHP variables.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles discourage unsafe global state, indirectly reducing exposure to variable-injection attacks.

A.8.28 Secure coding partial match
prevents

Secure coding explicitly prohibits use of deprecated upload variables and requires validated, server-side file handling.

A.8.30 Outsourced development partial match
prevents

Mandated testing for malicious content and known vulnerabilities reduces the likelihood that an outsourced component will contain or accept dangerous file types that could later be uploaded or executed.

References