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CVE-2021-20119

23
FAUCET Score

CVE-2021-20119 is a high-severity vulnerability affecting the Arris SurfBoard SB8200 modem, allowing any logged-in user to bypass security measures and change the administrator password. With a CVSS score of 7.1, this vulnerability has an adjacent attack vector and high impact on confidentiality, integrity, and availability, despite high attack complexity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
ab01.02.053.01_112320_193.0a.nshCPE matchmatch criteria
cpe:2.3:o:commscope:arris_surfboard_sb8200_firmware:ab01.02.053.01_112320_193.0a.nsh:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
36.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 30th percentile among its peer group of 45 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

giteavendor investigatingvia llm_extracted
opensshvendor investigatingvia llm_extracted
railsvendor investigatingvia llm_extracted

Vendor Advisories (3)

opensshllm-openssh-5683a08da8631380MEDIUM

Arris SurfBoard SB8200 Insecure Password Change Utility

Nov 8, 2021
giteallm-gitea-62dc02ce8e841519MEDIUM

Arris SurfBoard SB8200 Insecure Password Change Utility

Nov 8, 2021
railsllm-rails-34376699554e2e8eMEDIUM

Arris SurfBoard SB8200 Insecure Password Change Utility

Nov 8, 2021

References

tenable.com / security/research/tra-2021-49
ExploitThird Party Advisory