Auth bypass in Dlink Dap-1522
CVE-2020-15896
An authentication-bypass issue was discovered on D-Link DAP-1522 devices 1.4x before 1.10b04Beta02. There exist a few pages that are directly accessible by any unauthorized user, e.g., logout.php and login.php. This occurs because of checking the value of NO_NEED_AUTH. If the value of NO_NEED_AUTH is 1, the user has direct access to the webpage without any authentication. By appending a query string NO_NEED_AUTH with the value of 1 to any protected URL, any unauthorized user can access the application directly, as demonstrated by bsc_lan.php?NO_NEED_AUTH=1.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.017 (76.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Dlink Dap-1522 — versions a1
- Dlink Dap-1522 Firmware — versions 1.41, 1.42
Weakness classification (CWE)
Public proof-of-concept exploits
References
- supportannouncement.us.dlink.com/announcement/publication.aspx (Patch, Vendor Advisory)
- research.loginsoft.com/bugs/authentication-bypass-in-d-link-firmware-dap-1522/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15896?
- CVE-2020-15896 is a high-severity vulnerability in Dlink Dap-1522, classified under Improper Authentication. CVSS score: 7.5/10. Published 2020-07-22.
- How severe is CVE-2020-15896?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-15896 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.