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Cyber Security Agency of Singapore
Alerts

Active Exploitation of Vulnerability in Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-In

26 August 2026

Attackers are exploiting a critical vulnerability in Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-In to access, change or delete critical data. Patch immediately.

Last updated on 2 Sep 2026 to include Indicators of Compromise

Background

Oracle has released security updates to address a critical vulnerability (CVE-2026-21962) affecting Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-In. This vulnerability has a Common Vulnerability Scoring System (CVSS v3.1) score of 10.0 out of 10.

Impact

The vulnerability lies in the WebLogic Server Proxy Plug-in for Apache HTTP Server and the WebLogic Server Proxy Plug-in for IIS, and is easily exploitable. An unauthenticated attacker could compromise Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-in, gaining unauthorised access to critical data or complete access to all data accessible to these products, including the ability to create, delete or modify.

Known Exploitation

This vulnerability is reportedly being actively exploited, and a proof-of-concept exploit is publicly available.

Affected Products

The vulnerability affects the following products:

  • Oracle HTTP Server versions 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0

  • Oracle WebLogic Server Proxy Plug-In versions 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0

Indicators of Compromise

Indicators of Compromise (IOCs) from a campaign targeting this vulnerability can be found at: https://socradar.io/blog/snowlight-government-chinese-campaign/ (opens in new tab).

Recommendations

Users and administrators of affected products are advised to update to the latest versions immediately.

References

https://www.oracle.com/security-alerts/cpujan2026.html (opens in new tab)

https://nvd.nist.gov/vuln/detail/CVE-2026-21962 (opens in new tab)

https://socradar.io/blog/snowlight-government-chinese-campaign/ (opens in new tab)