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CISA has added CVE-2026-21962 to its Known Exploited Vulnerabilities catalog after confirming active attacks against Oracle HTTP Server and the Oracle WebLogic Server Proxy Plug-in. The maximum-severity flaw, rated CVSS 10.0, affects versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0, and can be exploited by unauthenticated attackers over HTTP to compromise exposed systems, including unauthorized access to and modification of critical data. Public reporting describes the issue as a URI normalization path traversal bug that may also enable privilege escalation and execution of injected code through crafted requests.
Oracle issued patches in its January 2026 Critical Patch Update, but reporting from GreyNoise and CloudSEK indicated exploitation in the wild, prompting CISA to order Federal Civilian Executive Branch agencies to remediate by August 27, 2026 under Binding Operational Directive 26-04. Because CISA did not publish indicators of compromise, defenders are being urged to patch immediately and to treat internet-facing Oracle WebLogic and HTTP Server deployments as potentially compromised until proven otherwise.
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7 events from the most recent confirmed update back to the earliest known activity.
On Monday, CISA added CVE-2026-21962 to its Known Exploited Vulnerabilities catalog after confirming active exploitation. CISA described the issue as an improper access control flaw that can enable unauthorized access to or modification of critical data in affected Oracle products.
In July 2026, SOCRadar reported that a China-linked threat actor used CVE-2026-21962 alongside other vulnerabilities in attacks targeting government organizations.
In March 2026, CloudSEK reported exploitation attempts against its honeypot network targeting CVE-2026-21962. It also saw attackers probe older Oracle WebLogic vulnerabilities including CVE-2020-14882, CVE-2020-14883, CVE-2020-2551, and CVE-2017-10271.
In February 2026, GreyNoise observed the IP address 193.24.123[.]42 attempting to exploit multiple vulnerabilities, including CVE-2026-21962 affecting Oracle WebLogic. The activity also targeted Ivanti Endpoint Manager Mobile, GNU InetUtils, and GLPI flaws.
CloudSEK said its honeypots observed exploitation attempts against Oracle WebLogic servers starting on January 22, 2026. According to the report, the activity began immediately after a proof-of-concept exploit for CVE-2026-21962 was made public.
A proof-of-concept exploit for CVE-2026-21962 became publicly available on January 21, 2026. Subsequent reporting tied exploitation activity against Oracle WebLogic servers to the PoC's release.
Oracle made fixes for CVE-2026-21962 available in its January 2026 Critical Patch Update. The flaw affects Oracle HTTP Server and Oracle WebLogic Server Proxy Plug-in.
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CISA added **Oracle WebLogic Server** vulnerability `CVE-2024-21182` to its **Known Exploited Vulnerabilities** catalog after confirming active exploitation, and ordered U.S. federal civilian agencies to patch affected systems by June 4 under **Binding Operational Directive 22-01**. The flaw affects WebLogic Server versions `12.2.1.4.0` and `14.1.1.0.0`, carries a `CVSS 7.5` rating, and can be exploited remotely by an unauthenticated attacker with network access using `T3` or `IIOP` protocols. Successful exploitation could expose sensitive information or give attackers full access to data reachable by the server, raising concern for both government and enterprise environments. Oracle issued fixes in July 2024, but CISA warned that WebLogic bugs are frequently used as initial access vectors, and reporting indicated more than 1,592 internet-exposed WebLogic servers may be vulnerable; private-sector organizations were also urged to patch quickly as attackers have historically leveraged WebLogic flaws for botnets, cryptomining, and ransomware activity.
Jun 29, 2026
Attackers began exploiting **Oracle WebLogic Server** vulnerability `CVE-2026-21962` almost immediately after public proof-of-concept code was posted, according to observations from a high-interaction honeypot emulating an unpatched **WebLogic Server 14.1.1.0.0** instance. The flaw is a **CVSS 10.0** unauthenticated remote code execution issue in the WebLogic Console, and researchers recorded active exploitation attempts over a 12-day period, showing how quickly newly disclosed enterprise software vulnerabilities can be operationalized. The activity was largely automated and opportunistic, with scans and exploit attempts originating mainly from rented VPS infrastructure including **DigitalOcean** and **HOSTGLOBAL.PLUS**. Researchers also observed continued abuse of older WebLogic flaws such as `CVE-2020-14882`, `CVE-2020-14883`, `CVE-2020-2551`, and `CVE-2017-10271`, alongside probes for unrelated weaknesses in **Hikvision** devices and **PHPUnit**, indicating a broad spray-and-pray campaign. Common tooling included **libredtail-http** and the **Nmap Scripting Engine**, while defenders were urged to apply Oracle patches, restrict internet exposure of the administrative console, deploy a **WAF**, and monitor for suspicious activity including `wget` or `curl` execution.
Jun 29, 2026
Oracle released its January 2026 *Critical Patch Update (CPU)*, delivering **337 security updates addressing 158 unique CVEs** across roughly 30 product families; **27** of the updates were rated **critical**. Tenable’s analysis highlights broad exposure to remotely exploitable issues without authentication across multiple Oracle product lines, and notes **CVE-2026-21945**, a high-severity **SSRF** issue in Oracle Java, was discovered by Tenable Research. A standout issue in the CPU is **CVE-2026-21962** (CVSS **10.0**), an **easily exploitable, unauthenticated, network-reachable (HTTP)** vulnerability in Oracle Fusion Middleware components **Oracle HTTP Server** and the **WebLogic Server Proxy Plug-ins** (Apache and IIS). Successful exploitation can enable **unauthorized creation, deletion, or modification of critical data** and potentially broader downstream impact due to a **scope change** (`S:C`), meaning compromise may significantly affect additional products; affected versions include **12.2.1.4.0**, **14.1.1.0.0**, and **14.1.2.0.0** (with the IIS proxy plug-in affected in **12.2.1.4.0** only).
Jun 29, 2026