Exploited CVEs / Apache / CVE-2020-17530
CVE-2020-17530
Apache Struts Remote Code Execution Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-05-03 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited Apache Struts vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2021-11-03.
Risk summary
Updated July 28, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2020-17530
Apache Struts strikes again with forced OGNL evaluation on raw user input in tag attributes, giving remote code execution on the application server. With a 96 percent EPSS score and confirmed exploitation in CISA KEV, any internet-facing application on a vulnerable Struts version is effectively pre-compromised. Struts apps tend to be old line-of-business systems nobody owns, which is exactly where this bug survives.
Do this: Inventory Java applications for vulnerable Struts versions and upgrade or take them offline before anything else this week.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2020-17530
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2020-17530
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2022-05-03 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2020-17530
Check the vendor's security advisory channel for the patched Struts versions and workarounds.
Common questions about CVE-2020-17530
Is CVE-2020-17530 actively exploited?
Yes. CVE-2020-17530 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 96%.
What is the CISA deadline and required action for CVE-2020-17530?
CISA set the federal (BOD 22-01) remediation due date at 2022-05-03, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2020-17530?
Check the vendor's security advisory for the patched Struts versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2020-17530?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2020-17530's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
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