CVE-2022-36557
CWE-434Published: August 29, 2022· Updated: Jun 17, 2026
Official Description
Seiko SkyBridge MB-A100/A110 v4.2.0 and below was discovered to contain an arbitrary file upload vulnerability via the restore backup function. This vulnerability allows attackers to execute arbitrary code via a crafted html file.
Risk Analysis
An arbitrary file upload vulnerability in the backup restore function of Seiko SkyBridge MB-A100/A110 firmware allows remote attackers to execute arbitrary code. This critical flaw carries a CVSS score of 9.8 due to the ease of remote exploitation.
No public exploit is currently circulating, and the vulnerability is not in the KEV database. It is remotely exploitable without authentication.
Update the device firmware to a version later than 4.2.0 and restrict access to the backup restore functionality.
Technical Analysis
CVE-2022-36557 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-434)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-36557 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts