CVE-2021-36260
CriticalExploitedPublic exploitA command injection vulnerability in the web server of some Hikvision product.
Published Sep 23, 2021 · Updated Oct 21, 2025
Key Facts
Patch immediately- CVE-2021-36260 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Ds-2cd2021g1-I\(w\) Firmware (Hikvision), Ds-2cd2023g2-I\(u\) Firmware (Hikvision), Ds-2cd2026g2-Iu\/sl Firmware (Hikvision) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 6, 2021. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including hikvision ds-7104ni-q1 firmware <=4.31.100, hikvision ds-7104ni-q1\/4p firmware <=4.31.100, hikvision ds-7104ni-q1\/4p\/m firmware <=4.31.100.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-36260 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jan 10, 2022 | Jan 24, 2022 | Not reported |
| Industry KEV feed | Dec 6, 2021 | Jan 24, 2022 | Not reported |
| CIRCL KEV | Jan 10, 2022 | Jan 24, 2022 | Not reported |
| ENISA EUVD | Jan 10, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
256 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Ds-2cd2021g1-I\(w\) FirmwareHikvision | See advisory | n/a |
| Ds-2cd2023g2-I\(u\) FirmwareHikvision | See advisory | n/a |
| Ds-2cd2026g2-Iu\/sl FirmwareHikvision | See advisory | n/a |
| Ds-2cd2027g2-L\(u\) FirmwareHikvision | See advisory | n/a |
| Ds-2cd2027g2-Lu\/sl FirmwareHikvision | See advisory | n/a |
Patched Releases
hikvision ds-7104ni-q1 firmware
<=4.31.100
hikvision ds-7104ni-q1\/4p firmware
<=4.31.100
hikvision ds-7104ni-q1\/4p\/m firmware
<=4.31.100
hikvision ds-7104ni-q1\/m firmware
<=4.31.100
hikvision ds-7108ni-q1 firmware
<=4.31.100
hikvision ds-7108ni-q1\/8p firmware
<=4.31.100
hikvision ds-7108ni-q1\/8p\/m firmware
<=4.31.100
hikvision ds-7108ni-q1\/m firmware
<=4.31.100
hikvision ds-7604ni-q1 firmware
<=4.31.000
hikvision ds-7604ni-q1\/4p firmware
<=4.31.000
hikvision ds-7608ni-k1\/8p\/4g firmware
<=4.31.000
hikvision ds-7608ni-q1 firmware
<=4.31.000
hikvision ds-7608ni-q1\/8p firmware
<=4.31.000
hikvision ds-7608ni-q2 firmware
<=4.31.000
hikvision ds-7608ni-q2\/8p firmware
<=4.31.000
hikvision ds-7616ni-k1 firmware
<=4.31.000
hikvision ds-7616ni-q1 firmware
<=4.31.000
hikvision ds-7616ni-q2 firmware
<=4.31.000
hikvision ds-7616ni-q2\/16p firmware
<=4.31.000
Timeline
Publicly disclosed
Sep 23, 2021
Added to Industry KEV feed
Dec 6, 2021
Added to CISA KEV
Jan 10, 2022
Added to CIRCL KEV
Jan 10, 2022
Added to ENISA EUVD
Jan 10, 2022
Last updated
Oct 21, 2025
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryhttps://therecord.media/experts-warn-of-widespread-exploitation-involving-hikvision-cameras/
- advisoryhttps://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification-command-injection-vulnerability-in-some-hikvision-products/
- advisoryhttps://www.securitynewspaper.com/2021/09/22/zero-day-vulnerability-in-apples-new-icloud-private-relay-service-for-ios-15-allows-seeing-user-real-ip-addresses/
- advisoryUSOM advisory
- exploithttp://packetstormsecurity.com/files/164603/Hikvision-Web-Server-Build-210702-Command-Injection.html
FAQ
Common Questions.
A command injection vulnerability in the web server of some Hikvision product.
Affected: Ds-2cd2021g1-I\(w\) Firmware (Hikvision); Ds-2cd2023g2-I\(u\) Firmware (Hikvision); Ds-2cd2026g2-Iu\/sl Firmware (Hikvision), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Dec 6, 2021.
Yes. It was added on Jan 10, 2022 with a federal remediation due date of Jan 24, 2022.
Public exploit code is available.
Fixed versions are available, including hikvision ds-7104ni-q1 firmware <=4.31.100, hikvision ds-7104ni-q1\/4p firmware <=4.31.100, hikvision ds-7104ni-q1\/4p\/m firmware <=4.31.100.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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