Actively Exploited Oracle WebLogic Flaw Lets Unauthenticated Attackers Access Critical Data
CISA added actively exploited Oracle WebLogic flaw CVE-2026-21962 (CVSS 10.0) to its KEV catalog, letting unauthenticated attackers access or modify critical data.
CISA added CVE-2026-21962, a CVSS 10.0 improper access control flaw in Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-in, to its Known Exploited Vulnerabilities catalog, citing evidence of active exploitation. Oracle shipped patches in January 2026, and GreyNoise, CloudSEK, and SOCRadar have since reported exploitation attempts, including a lone IP scanning multiple WebLogic, Ivanti, GNU InetUtils, and GLPI vulnerabilities. The flaw is also among several exploited by a China-linked actor delivering the SNOWLIGHT downloader to government and commercial infrastructure in more than 100 countries. Federal civilian agencies must apply fixes by August 27, 2026 under BOD 26-04.
- CVE-2026-21962 (CVSS 10.0) allows unauthenticated attackers over HTTP unauthorized access to or modification of critical data.
- Patches shipped in January 2026, but GreyNoise, CloudSEK, and SOCRadar report ongoing exploitation attempts since February.
- A China-linked actor used the flaw among others to deliver the SNOWLIGHT downloader across 100+ countries.
- Federal agencies must patch by August 27, 2026 under BOD 26-04.
- Threat actors repeatedly reuse older WebLogic RCEs: CVE-2020-14882/14883, CVE-2020-2551, CVE-2017-10271.
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2017-10271 | Unauthenticated Remote Code Execution in Oracle WebLogic Server | 7.5 | 100% | KEVRansomwarePoC ×3 | KEV |
CVE-2020-14882+1 related CVE | Remote Code Execution in Oracle WebLogic Server | 9.8 group max | 100% | KEVPoC ×3 | KEV |
| CVE-2020-2551 | Unauthenticated Remote Code Execution in Oracle WebLogic Server via IIOP | 9.8 | 93% | KEV | KEV |
| CVE-2026-21962 | Unauthenticated Access Control Bypass in Oracle HTTP Server and WebLogic Proxy Plug-in | 10.0 | 73% | KEV | KEV |
From the original article
2 min read at thehackernews.com
Ravie Lakshmanan Aug 25, 2026 Vulnerability / Enterprise Security The U. S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added a maximum-severity security flaw impacting Oracle HTTP Server and Oracle WebLogic Server to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation.
By @TheHackersNews · thehackernews.com
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