Vulnerability Details : CVE-2021-20090
A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.
Vulnerability category: Directory traversal
CVE-2021-20090
is in the CISA Known Exploited Vulnerabilities Catalog
CISA vulnerability name:
Arcadyan Buffalo Firmware Path Traversal Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA description:
Arcadyan Buffalo firmware contains a path traversal vulnerability that could allow unauthenticated, remote attackers to bypass authentication and access sensitive information. This vulnerability affects multiple routers across several different vendors.
Added on
2021-11-03
Action due date
2021-11-17
Exploit prediction scoring system (EPSS) score for CVE-2021-20090
Probability of exploitation activity in the next 30 days: 96.91%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 100 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-20090
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
[email protected] |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
[email protected] |
CWE ids for CVE-2021-20090
-
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.Assigned by: [email protected] (Primary)
References for CVE-2021-20090
-
https://www.tenable.com/security/research/tra-2021-13
Exploit;Third Party Advisory
-
https://www.kb.cert.org/vuls/id/914124
Third Party Advisory;US Government Resource
Products affected by CVE-2021-20090
- cpe:2.3:o:buffalo:wsr-2533dhpl2-bk_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:buffalo:wsr-2533dhp3-bk_firmware:*:*:*:*:*:*:*:*