Paper/Archive/CVE-2021-20090

CVE-2021-20090

Arcadyan Buffalo Firmware — Arcadyan Buffalo Firmware Path Traversal Vulnerability

KEV · due 17 Nov EPSS 100%public exploit SSVC act CVSS 9.8

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 In CISA KEV+3030.0 EPSS percentile 100.01.000 × 2020.0 Exploit: SSVC active+1010.0 SSVC exploitation: active+1010.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3WSR-2533DHPL2 <=1.02, WSR-2533DHP3 <= 1.24–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

reftenable.com/security/research/tra-2021-13 writeupkb.cert.org/vuls/id/914124 refsecpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090 kevcisa.gov/known-exploited-vulnerabilities-catalog