CVE-2017-5521: in the CISA KEV catalogue
NETGEAR Multiple Devices Exposure of Sensitive Information Vulnerability. CISA added CVE-2017-5521 to the Known Exploited Vulnerabilities catalogue on 2022-09-08 with a default due date of 2022-09-29. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Multiple NETGEAR devices are prone to admin password disclosure via simple crafted requests to the web management server. (CISA description)
- Vendor / product
- NETGEAR Multiple Devices
- CWE
- CWE-200
- CISA required action
- Apply updates per vendor instructions. If the affected device has since entered end-of-life, it should be disconnected if still in use.
- EPSS
- 89%, percentile 99 (scored 2026-11-03)
EPSS puts about 89 in 100 odds (89%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2017-5521 in the CISA KEV catalogue?
Yes. CISA added CVE-2017-5521 (NETGEAR Multiple Devices Exposure of Sensitive Information Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-09-08. CISA's default due date for it is 2022-09-29.
Is CVE-2017-5521 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2017-5521. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2017-5521?
CISA's required action: Apply updates per vendor instructions. If the affected device has since entered end-of-life, it should be disconnected if still in use.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2017-5521