CVE-2017-7921

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-03-05. Federal remediation due 2026-03-26.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

99.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2017-05-06 00:00Z9 YR AGO

Last updated

2026-03-06 05:01Z7 MO AGO

Reserved

2017-04-18

Assigning CNA

icscert

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.2

Document digest

4037147ad8c97a528386c42f9bfda85fcbbfc1dd1073ff07e463a85baec661e3

• ics-cert.us-cert.govhttps://ics-cert.us-cert.gov/advisories/ICSA-17-124-01x_refsource_MISC
• www.securityfocus.com98313http://www.securityfocus.com/bid/98313vdb-entryx_refsource_BID
• ghostbin.comhttps://ghostbin.com/paste/q2vq2x_refsource_MISC
• www.hikvision.comhttp://www.hikvision.com/us/about_10805.htmlx_refsource_MISC
• www.hikvision.comhttps://www.hikvision.com/us-en/support/document-center/special-notices/privilege-escalating-vulnerability-in-certain-hikvision-ip-cameras/
• www.hikvision.comhttps://www.hikvision.com/cn/support/CybersecurityCenter/SecurityNotices/20170314/
• www.hikvision.comhttps://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification--privilege-escalating-vulnerability-in-cer/
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7921government-resource