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CVE-2022-28704

19
FAUCET Score

CVE-2022-28704 is an improper access control vulnerability affecting Rakuten Casa devices running firmware versions AP_F_V1_4_1 or AP_F_V2_0_0. This flaw allows a remote attacker to gain root privileges and execute arbitrary operations if the device is in its default configuration, accepting SSH connections from the WAN and using default authentication credentials. Rated 7.2 HIGH on the CVSS scale, this vulnerability presents a significant risk due to its network-based attack vector and low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. The prerequisite of default settings and WAN-accessible SSH makes it a critical concern for unhardened deployments. Currently, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed on CISA's KEV catalog, suggesting no active widespread exploitation. Community discussion and media coverage are also minimal, indicating low public awareness despite its high severity.

Impacted Technologies

VendorProductVersion(s)CPE
ap_f_v1_4_1CPE matchmatch criteria
cpe:2.3:a:rakuten:casa:ap_f_v1_4_1:*:*:*:*:*:*:*
ap_f_v2_0_0CPE matchmatch criteria
cpe:2.3:a:rakuten:casa:ap_f_v2_0_0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
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
2.45%
Probability of exploitation in next 30 days
EPSS Percentile
82.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0245 is in the 80th percentile among its peer group of 5,531 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 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

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN46892984/index.html
Third Party AdvisoryVDB Entry
network.mobile.rakuten.co.jp / information/news/product/1033
Vendor Advisory