Known exploited vulnerability
CVE-2017-7921
The short answer
CVE-2017-7921 affects n/a Hikvision Cameras and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-03-05: attackers are using it, so patch it first.
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.
Weakness: CWE-287.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 5, 2026
Federal due date Mar 26, 2026
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Hikvision Cameras. NVD's record lists the exact affected versions.
References
- ghostbin.com/paste/q2vq2 Broken Link
- ics-cert.us-cert.gov/advisories/ICSA-17-124-01 Third Party AdvisoryUS Government Resource
- ghostbin.com/paste/q2vq2 Broken Link
- ics-cert.us-cert.gov/advisories/ICSA-17-124-01 Third Party AdvisoryUS Government Resource
- www.hikvision.com/cn/support/CybersecurityCenter/SecurityNotices/20170314/ Third Party Advisory
- www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification--privilege-escalating-vulnerability-in-cer/ Third Party Advisory
- www.hikvision.com/us-en/support/document-center/special-notices/privilege-escalating-vulnerability-in-certain-hikvision-ip-cameras/ Third Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7921 US Government Resource
Questions
Is CVE-2017-7921 being exploited?
Yes. CISA added CVE-2017-7921 to its Known Exploited Vulnerabilities catalog on 2026-03-05, with a federal remediation due date of 2026-03-26.
How do I fix CVE-2017-7921?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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