---
id: "CVE-2021-36260"
kind: "vulnerability"
aliases: ["CVE-2021-36260"]
title: "Hikvision Security cameras web server: Hikvision Improper Input Validation"
severity: "critical"
cvss: 9.8
epss: 0.99869
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Hikvision Security cameras web server", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "hikvision", "infrastructure", "ip-cameras", "self-hosted"]
not_affected_if: ["not-internet-exposed"]
published_at: "2021-09-22T13:15:07+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-36260", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2021-36260", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-36260", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Hikvision Security cameras web server: Hikvision Improper Input Validation

Hikvision security cameras run a web server with a command injection flaw caused by missing input validation. An unauthenticated attacker can send crafted requests to run commands on the camera.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Hikvision Security cameras web server affected ? fixed ?

## Fix

Apply the vendor update per Hikvision instructions; CISA says to apply updates per vendor instructions.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-36260
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2021-36260
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-36260

## Documents

- [discussion] @GreyNoiseIO: Last week, GreyNoise reported Hikvision CVE-2021-36260 exploitation attempts aga https://x.com/GreyNoiseIO/status/2110112391031857345

## From the sources

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.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_