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CVE-2026-24479

Hustoj remote code execution

9.8 CRITICALEPSS 8.32%
  1. Published27 Jan 2026

Description

HUSTOF is an open source online judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training. Prior to version 26.01.24, the problem_import_qduoj.php and problem_import_hoj.php modules fail to properly sanitize filenames within uploaded ZIP archives. Attackers can craft a malicious ZIP file containing files with path traversal sequences (e.g., ../../shell.php). When extracted by the server, this allows writing files to arbitrary locations in the web root, leading to Remote Code Execution (RCE). Version 26.01.24 contains a fix for the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hustoj< 26.01.24

Remediation

Fixed in
Hustoj≥ 26.01.24

References

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Frequently asked

Is CVE-2026-24479 being actively exploited?

CVE-2026-24479 is not in the CISA KEV catalog. Its EPSS exploit probability is 8.32%.

How severe is CVE-2026-24479?

CVE-2026-24479 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 8.32% probability of exploitation.

Which products are affected by CVE-2026-24479?

Affected products include Hustoj.

How do I fix CVE-2026-24479?

Upgrade affected software to a fixed version, for example Hustoj 26.01.24 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-24479 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.