Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2026-21962

Oracle HTTP Server

Oracle HTTP Server · 12.2.1.4.0

Watch CVE-2026-21962 Browse KEV feed
Severity
CVSS 10.0 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
73.2%
First observed
04 Aug 2026
Last observed
26 Aug 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-21962 is an unauthenticated vulnerability affecting Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in. Vulnerability in the Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in product of Oracle...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence. Listed in CISA KEV. Also confirmed by third-party sources.

Who is affected?

Oracle HTTP Server 12.2.1.4.0.

What should we do?

Patch immediately, validate internet-facing exposure, and monitor for matching requests.

Overview

Oracle HTTP Server

Vulnerability in the Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in product of Oracle Fusion Middleware (component: Weblogic Server Proxy Plug-in for Apache HTTP Server, Weblogic Server Proxy Plug-in for IIS). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in. While the vulnerability is in Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in, attacks may significantly impact additional products (scope change).

Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in accessible data as well as unauthorized access to critical data or complete access to all Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in accessible data. Note: Affected version for Weblogic Server Proxy Plug-in for IIS is 12.2.1.4.0 only. CVSS 3.1 Base Score 10.0 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N).

Oracle Corporation Affected
Oracle HTTP Server, Oracle Weblogic Server Proxy Plug-in
12.2.1.4.0 14.1.1.0.0 14.1.2.0.0
View vendor advisory (opens in new tab)
Published
20 Jan 2026
Exploited Since
04 Aug 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

apache cisa

CVE References

  • CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-21962
  • Oracle Advisory oracle.com · Vendor Advisory https://www.oracle.com/security-alerts/cpujan2026.html

Exploitation evidence

Why Previdian marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 24 Aug 2026

Previdian independently recorded this as exploited after first seeing it in honeypot sensors.

Active exploitation observed

Previdian sensor

First observed 04 Aug 2026

Previdian first observed exploitation attempts targeting this vulnerability in our honeypot sensors.

Proof of concept available

GitHub

Recorded 27 Aug 2026

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian Pro API.

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Source Added
CISA First 2026-08-24 18:00 UTC
CVE 2026-08-24 19:10 UTC
The Hacker News 2026-08-25 06:12 UTC
Previdian Sensors 2026-08-25 15:46 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Previdian sensors recorded exploitation attempts targeting this vulnerability. The cards and chart show volume, unique attackers, and daily activity.

23

Attempts observed

9

Unique attacker IPs

6

Attacker countries

AE · CN · HK · NL · SG · US

2

Sensors observed

CVE-2026-21962 exploitation attempts over the last 68 days

Daily events observed by Previdian sensors

Updated 09 Oct 2026

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3 Aug 17 Aug 31 Aug 14 Sep 9 Oct

First observed 04 Aug 2026 · Last observed 26 Aug 2026

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Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

Attacker IP Indicators

Attacker IP indicators observed · available in Pro and Enterprise.

Sensor-derived attacker IP indicators are available to Pro and Enterprise accounts under Detection and through the Pro API.

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Risk and context

Severity, weaknesses, and research context

CVSS v3.1

10.0 Critical

Potential damage if exploited. Separate from whether attackers are using it.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

EPSS

73.2%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Improper Access Control CWE-284

Recent mention · RecordedFuture

August 2026 CVE Landscape

In August 2026, Insikt Group® identified 73 high-impact vulnerabilities that should be prioritized for remediation, 43 of which had a Very Critical Recorded Future Risk Score. This represents a 14% decrease from last month.

Read full advisory

All Mentions

Recent mention · RecordedFuture

August 2026 CVE Landscape

RecordedFuture · 08 Sep 2026

In August 2026, Insikt Group® identified 73 high-impact vulnerabilities that should be prioritized for remediation, 43 of which had a Very Critical Recorded Future Risk Score. This represents a 14% decrease from last month.

Recent mention · The Hacker News

Actively Exploited Oracle WebLogic Flaw Lets Unauthenticated Attackers Access Critical Data

The Hacker News · 25 Aug 2026

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. The vulnerability, tracked as CVE-2026-21962 (CVSS score: 10.0), allows an unauthenticated attacker with network access via HTTP to

Potential Proof of Concepts

These PoCs are unverified and could contain malware. Use at your own risk.

zeetee1235/CVE-2026-21962

github · Created 2026-08-27 02:59:01 UTC · 0 stars · AI assessment 90%

Timeline

From disclosure to observed exploitation

  1. 02:59 UTC

    Public PoC available

    Public proof-of-concept code published

  2. 06:12 UTC

    KEV confirmed by The Hacker News

    Exploitation attested by an external source

  3. 19:10 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  4. 18:00 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  5. 09:51 UTC

    Indicators of compromise added (9)

    Indicators of compromise recorded

  6. 09:51 UTC

    Observed by Previdian sensors

    Evidence-backed exploitation signal

  7. 21:56 UTC

    CVE published

    Vulnerability disclosed publicly

  8. 18:07 UTC

    CVE ID reserved

    Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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  • Evidence confidence and provenance
  • First-party sensor telemetry
  • PoC and scanner references
  • Affected versions and enrichment
  • Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-21962

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2026-21962",
  "confidence": "Confirmed",
  "cvss_score": 10.0,
  "cvss_estimated": false,
  "epss_score": 0.73192,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 23, "sensors": 2 }
}