Apache Struts multipart request processing disk exhaustion DoS
CVE-2025-66675 is a denial-of-service vulnerability in Apache Struts caused by incomplete cleanup of temporary files created during multipart/form-data request processing. A file leak in the multipart handling path allows temporary upload artifacts to accumulate on disk instead of being properly removed, eventually exhausting available storage. The issue affects Apache Struts versions 2.0.0 through 6.7.4 and 7.0.0 through 7.0.3. The advisory notes this CVE is related to CVE-2025-64775 and specifically corrects the affected version range to include 6.7.4.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Denial of service in Apache Struts where multipart request processing can leak files leading to disk exhaustion.
A denial-of-service (DoS) vulnerability in Apache Struts caused by incomplete cleanup of temporary files during multipart/form-data request handling, leading to disk exhaustion and potential service outages.
A denial of service vulnerability in Apache Struts where a file leak in multipart request processing can cause disk exhaustion, leading to service disruption. The issue is remotely exploitable and affects a wide range of Apache Struts versions.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.