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Vulnerability report

Active exploitation observed Confirmed confidence In CISA KEV

CVE-2021-36260

IP Camera Command Injection

Hikvision / IP Camera

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Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Observed in sensors
EPSS
99.9%
First observed
19 Jul 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-2021-36260 is an unauthenticated vulnerability affecting Hikvision IP Camera. A command injection vulnerability in the web server of some Hikvision product. Due to the insufficient input validation, attacker can...

Is it exploited?

Yes. Previdian sensors observed exploitation attempts with confirmed confidence.

Who is affected?

Hikvision / IP Camera.

What should we do?

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

Overview

A command injection vulnerability in the web server of some Hikvision product

A command injection vulnerability in the web server of some Hikvision product.

Due to the insufficient input validation, attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.

Published
22 Sep 2021
Exploitation Reported
10 Jan 2022
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

cisa nuclei_scanner metasploit

CVE References

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 10 Jan 2022

Independent exploitation attestation added to the Previdian record.

Active exploitation observed

Previdian sensor

First observed 19 Jul 2026

First-party sensor telemetry confirms matching exploitation attempts.

Proof of concept available

GitHub

Recorded 18 Oct 2021

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 2022-01-10 00:00 UTC
The Shadowserver 2026-05-28 00:00 UTC
Previdian 2026-08-16 17:01 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.

10

Attempts observed

9

Unique attacker IPs

5

Attacker countries

CN · IN · JP · RU · US

9

Sensors observed

Exploitation attempts over the last 40 days

Daily events observed by Previdian sensors

Updated 26 Aug 2026

0
1
0
0
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
0
0
1
0
1
0
0
0
1
18 Jul 26 Jul 3 Aug 11 Aug 26 Aug

First observed 19 Jul 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
1
User-Agents
3

Raw values available in Pro and Enterprise.

Virtual patch status

No Previdian 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/linux/http/hikvision_cve_2021_36260_blind.rb 28 Apr 2025
Nuclei https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-36260.yaml 25 Apr 2025

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

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

EPSS

99.9%

Weaknesses

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') CWE-78

All CVSS Scores

CVSS v3.1 9.8 Critical

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

CVSS v2.0 9.3 High

AV:N/AC:M/Au:N/C:C/I:C/A:C

Potential Proof of Concepts

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

Cuerz/CVE-2021-36260

github · Created 2022-08-03 17:27:59 UTC · 149 stars · AI assessment 90%

海康威视RCE漏洞 批量检测和利用工具

Aiminsun/CVE-2021-36260

github · Created 2021-10-27 15:51:12 UTC · 266 stars · AI assessment 90%

command injection vulnerability in the web server of some Hikvision product. Due to the insufficient input validation, attacker can exploit the vulnerability to launch a command injection attack by sending some messages with malicious commands.

Hikvision IP camera/NVR - Remote Command Execution

nuclei · Created Unknown

hikvision_cve_2021_36260_blind

metasploit · Created Unknown

Metasploit module for CVE-2021-36260

Timeline

From disclosure to observed exploitation

  1. Observed by Previdian sensors

    Evidence-backed exploitation signal

  2. Indicators of compromise added (10)

    Indicators of compromise recorded

  3. KEV confirmed by The Shadowserver

    Exploitation attested by an external source

  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. Public PoC available

    Public proof-of-concept code published

  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-2021-36260

Free JSON includes basic KEV fields 
{
  "cve_id": "CVE-2021-36260",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.99869,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": true
  },
  "sensor_telemetry": { "attempts": 10, "sensors": 9 }
}

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