KEV Intelligence

Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2017-9822

DotNetNuke CMS Fixed in 9.1.1 DNN before 9.1.1 has Remote Code Execution

DotNetNuke / DotNetNuke CMS Fixed in 9.1.1 · DotNetNuke CMS Fixed in 9.1.1

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Severity
CVSS 8.8 · High
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
94.8%
First observed
12 Jun 2026
Last observed
23 Jul 2026

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2017-9822 is a vulnerability affecting DotNetNuke DotNetNuke CMS Fixed in 9.1.1. DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on...

Is it exploited?

Yes. KEV Intelligence sensors observed exploitation attempts with confirmed confidence.

Who is affected?

DotNetNuke / DotNetNuke CMS Fixed in 9.1.1 dotnetnuke cms fixed in 9.1.1.

What should we do?

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

Overview

DotNetNuke CMS Fixed in 9.1.1 DNN before 9.1.1 has Remote Code Execution

DNN (aka DotNetNuke) before 9.1.1 has Remote Code Execution via a cookie, aka "2017-08 (Critical) Possible remote code execution on DNN sites."

Vendor Product Affected Status
DotNetNuke DotNetNuke CMS Fixed in 9.1.1 DotNetNuke CMS Fixed in 9.1.1 Affected
Published
20 Jul 2017
Exploitation Reported
03 Nov 2021
Attack vector
Remote
Complexity
Low
Privileges
Low
User interaction
None

Tags

ransomware cisa malware dotnet nuclei_scanner metasploit

CVE References

Exploitation evidence

Why KEV Intelligence 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 03 Nov 2021

Independent exploitation attestation added to the KEV Intelligence record.

Active exploitation observed

KEV Intelligence sensor

First observed 27 Jun 2026

First-party sensor telemetry confirms matching exploitation attempts.

Used in malware

CISA

Recorded 03 Nov 2021

Malware families have been linked to exploitation of this CVE.

Proof of concept available

GitHub

Recorded 28 Aug 2020

Public scanner or PoC coverage increases practical exploitability.

Known exploited vulnerability sources

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

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Source Added
CISA First 2021-11-03 00:00 UTC
KEV Intelligence 2026-07-23 09:59 UTC

Operational indicators for this CVE are listed under Detection.

Sensor telemetry

First-party evidence of exploitation activity

Aggregate observations show the scale, recency, and distribution of activity without overstating sparse data.

2

Attempts observed

1

Unique attacker IPs

1

Attacker countries

US

1

Sensors observed

Exploitation attempts over the last 70 days

Daily events observed by KEV Intelligence sensors

Updated 19 Aug 2026

0
1
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1
0
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0
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0
2
0
42
32
2
0
78
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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2
0
0
0
2
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11 Jun 25 Jun 9 Jul 23 Jul 19 Aug

First observed 12 Jun 2026 · Last observed 23 Jul 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
1
User-Agents
1

Raw values available in Pro and Enterprise.

Virtual patch status

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

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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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Scanner Artifacts

Scanner and exploit-framework references linked to this CVE.

Scanner Reference Detected
Metasploit https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/dnn_cookie_deserialization_rce.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-9822.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

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

EPSS

94.8%

Weaknesses

Improper Control of Generation of Code ('Code Injection') CWE-94

All CVSS Scores

CVSS v3.1 8.8 High

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

CVSS v2.0 6.5 Medium

AV:N/AC:L/Au:S/C:P/I:P/A:P

Potential Proof of Concepts

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

DotNetNuke 5.0.0 - 9.3.0 - Cookie Deserialization Remote Code Execution

nuclei · Created Unknown

Timeline

From disclosure to observed exploitation

  1. Observed by KEV Intelligence sensors

    Evidence-backed exploitation signal

  2. Indicators of compromise added (39)

    Indicators of compromise recorded

  3. Public PoC available

    Public proof-of-concept code published

  4. Metasploit module available

    Exploit module available

  5. Nuclei template available

    Scanner coverage available

  6. Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  7. First public exploitation report

    Exploit observed in malware

  8. CVE published

    Vulnerability disclosed publicly

  9. 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-2017-9822

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2017-9822",
  "confidence": "Confirmed",
  "cvss_score": 8.8,
  "cvss_estimated": false,
  "epss_score": 0.94789,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 2, "sensors": 1 }
}

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