CVE-2021-20120
CVE-2021-20120 is a high-severity vulnerability in Commscope Arris Surfboard Sb8200 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- CVSS v2: 6.8
- EPSS exploit prediction: 1% (42nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-352
- Affected product: Commscope Arris Surfboard Sb8200 Firmware
- Published:
- Last modified:
Description
The administration web interface for the Arris Surfboard SB8200 lacks any protections against cross-site request forgery attacks. This means that an attacker could make configuration changes (such as changing the administrative password) without the consent of the user.
Frequently asked questions
- What is CVE-2021-20120?
- The administration web interface for the Arris Surfboard SB8200 lacks any protections against cross-site request forgery attacks. This means that an attacker could make configuration changes (such as changing the administrative password) without the consent of the user.
- How severe is CVE-2021-20120?
- CVE-2021-20120 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-20120 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-20120?
- CVE-2021-20120 affects Commscope Arris Surfboard Sb8200 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-20120?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-20120 published?
- CVE-2021-20120 was published on 2021-10-21 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:commscope:arris_surfboard_sb8200_firmware:ab01.02.053.01_112320_193.0a.nsh:*:*:*:*:*:*:*
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