CVE-2021-4471
Published: 14 November 2025
Summary
CVE-2021-4471 is a high-severity Insertion of Sensitive Information into Externally-Accessible File or Directory (CWE-538) vulnerability in Ssd Disclosure (inferred from references). Its CVSS base score is 8.7 (High).
Operationally, ranked in the top 45.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-34722
Vulnerability details
TG8 Firewall exposes a directory such as /data/ over HTTP without authentication. This directory stores credential files for previously logged-in users. A remote unauthenticated attacker can enumerate and download files within the directory to obtain valid account usernames and passwords,…
more
leading to loss of confidentiality and further unauthorized access.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Pre- and post-publication reviews prevent insertion of sensitive information into externally-accessible public locations.
Monitors for sensitive information placed in externally accessible files or directories.
The map shows if data actions result in sensitive information being placed in externally accessible locations.
Isolation and eradication reduce the ability to exploit sensitive information inserted into externally-accessible files or directories.
Approved categorization forces identification of externally accessible files that contain sensitive content so they receive proper protection.
The pre-implementation review identifies externally accessible files or directories containing PII and drives access restrictions or removal.
Tainting makes it possible to determine when sensitive data has been removed from externally accessible files or directories.
OPSEC practices stop placement of supply-chain information into locations accessible to external parties.