CVE-2022-28955
Published: 18 May 2022
Summary
CVE-2022-28955 is a high-severity Improper Authentication (CWE-287) vulnerability in Dlink Dir-816L Firmware. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 0.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-28955 is an access-control vulnerability (CWE-287) affecting the D-Link DIR-816L router running firmware version FW206b01. The flaw resides in the folder_view.php and category_view.php endpoints, which fail to enforce authentication and thereby expose internal directory contents to remote requests.
An unauthenticated attacker with network access can directly request the affected PHP files, bypassing any login requirement. Successful exploitation yields disclosure of folder listings and related metadata, corresponding to the observed CVSS 7.5 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Vendor references point to D-Link’s security-bulletin page for official guidance, while public GitHub postings document the affected endpoints and proof-of-concept requests. The CVE’s EPSS score remains elevated, with a current value of 0.9206 and a recorded peak of 0.9271.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-33387
Vulnerability details
An access control issue in D-Link DIR816L_FW206b01 allows unauthenticated attackers to access folders folder_view.php and category_view.php.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Detects unauthorized successful logons resulting from improper authentication implementations.
Documented procedures ensure personnel are trained on authentication mechanisms, tangibly lowering the risk of improper authentication being exploited.
Security awareness training instructs users on secure authentication practices and avoiding credential compromise.
Training on authentication mechanisms and best practices decreases the occurrence of improper authentication.
Non-repudiation requires strong authentication mechanisms to irrefutably attribute performed actions to specific individuals or processes.
Session content review can reveal authentication bypasses or failures in session establishment.
Review of authentication-related audit records can detect improper authentication mechanisms or bypasses.
Assessments check authentication mechanisms for correct implementation and effectiveness, reducing successful authentication bypass attempts.