Vulnerability Intelligence Report
Arcadyan Buffalo Firmware Path Traversal Vulnerability
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.
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.8
CRITICAL
Exploitability:3.9
Impact Score:5.9
EPSS Probability:99.98%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-22 ↗CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| buffalo | wsr-2533dhpl2-bk_firmware | all |
| buffalo | wsr-2533dhpl2-bk | all |
| buffalo | wsr-2533dhp3-bk_firmware | all |
| buffalo | wsr-2533dhp3-bk | all |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
99.983%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Tenable Network Security, Inc. · Vendor · USA |
| Reserved | 2020-12-17T00:00:00 |
| Published | 2021-04-29T00:00:00 |
| Last Updated | 2025-10-21T23:25:47 |
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