Credential disclosure via unencrypted Basic authentication
Published Feb 4, 2022 · Updated Apr 15, 2025
Information disclosure in SeaConnect 370W 1.3.34 allows man-in-the-middle attackers to capture web credentials and HTTP content. The embedded web server sends HTTP Basic Authentication credentials as Base64 text and provides no TLS support, leaving each authenticated session readable in transit. Network access between an administrator and the device is required; captured credentials grant access to view and edit device configuration.
Summary
What happened
Information disclosure in SeaConnect 370W 1.3.34 allows man-in-the-middle attackers to capture web credentials and HTTP content. The embedded web server sends HTTP Basic Authentication credentials as Base64 text and provides no TLS support, leaving each authenticated session readable in transit. Network access between an administrator and the device is required; captured credentials grant access to view and edit device configuration.
The record
- CVE
- CVE-2021-21963
- Published
- Feb 4, 2022
- Updated
- Apr 15, 2025
- Vendor
- Sealevel Systems, Inc.
- Product
- SeaConnect 370W
- Classifications
- CWE-311, T1040
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 4, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Sealevel Systems, Inc. SeaConnect 370W v1.3.34
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo