---
title: "CVE-2017-7921: Hikvision Multiple Products Improper Authentication Vulnerability"
url: https://erroneo.us/security/cve/CVE-2017-7921/
description: "CVE-2017-7921 (Hikvision Multiple Products): Exploited in the wild (CISA KEV). An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I…"
type: vulnerability-record
section: "Security Digest"
date_published: 2017-05-06
date_modified: 2026-03-06
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2017-7921"
kev: true
cvss: 9.8
epss: 0.99998
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2017-7921: Hikvision Multiple Products Improper Authentication Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Hikvision Multiple Products. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-03-05, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-03-26 ; treat that as the outer limit, not the target.
- EPSS 100.0% , percentile 100.0: FIRST’s model estimates a 100.0% chance of exploitation activity in the next 30 days, higher than 100.0% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 160530, DS-2CD2xx0F-I Series V5.2.0 build 140721 to V5.4.0 Build 160401, DS-2CD2xx2FWD Series V5.3.1 build 150410 to V5.4.4 Build 161125, DS-2CD4x2xFWD Series V5.2.0 build 140721 to V5.4.0 Build 160414, DS-2CD4xx5 Series V5.2.0 build 140721 to V5.4.0 Build 160421, DS-2DFx Series V5.2.0 build 140805 to V5.4.5 Build 160928, and DS-2CD63xx Series V5.0.9 build 140305 to V5.3.5 Build 160106 devices. The improper authentication vulnerability occurs when an application does not adequately or correctly authenticate users. This may allow a malicious user to escalate his or her privileges on the system and gain access to sensitive information.

## Affected products (CVE record)

- n/a Hikvision Cameras: Hikvision Cameras

## Severity

- CISA-ADP CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2026-03-05; federal due date 2026-03-26. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 100.00% probability of exploitation activity in the next 30 days; percentile 100.0.

## Sources

- [Listed in CISA KEV notes (hikvision.com)](https://www.hikvision.com/us-en/support/document-center/special-notices/privilege-escalating-vulnerability-in-certain-hikvision-ip-cameras/)
- [CVE.org record CVE-2017-7921](https://www.cve.org/CVERecord?id=CVE-2017-7921)
- [NVD entry CVE-2017-7921](https://nvd.nist.gov/vuln/detail/CVE-2017-7921)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7921)
- [ics-cert.us-cert.gov](https://ics-cert.us-cert.gov/advisories/ICSA-17-124-01)
- [98313](http://www.securityfocus.com/bid/98313)
- [ghostbin.com](https://ghostbin.com/paste/q2vq2)
- [hikvision.com](http://www.hikvision.com/us/about_10805.html)
- [hikvision.com](https://www.hikvision.com/cn/support/CybersecurityCenter/SecurityNotices/20170314/)
- [hikvision.com](https://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification--privilege-escalating-vulnerability-in-cer/)

---
Source page: https://erroneo.us/security/cve/CVE-2017-7921/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt