SARA / Free Tools / KEV / CVE-2021-20090

CVE-2021-20090 on CISA KEV

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 — Actively Exploited

A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1

Vendor / Product
— / —
Added to KEV
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BOD 22-01 due
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Ransomware use
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CVSS / EPSS
9.8 — · EPSS —

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

- CISA KEV: Apply updates per vendor instructions.

03Notes & references

No additional references available in the KB record.

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

No structured affected-product list available — see references below for vendor advisories.

06Detection

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