CVE-2021-4471 json
TG8 Firewall Unauthenticated User Password Disclosure
published 2025-11-14 11 mo ago modified 2026-06-17 4 mo ago also EUVD-2021-34722
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
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, leading to loss of confidentiality and further unauthorized access.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- TG8 TG8 Firewall
Classification
- Weakness
-
- CWE-538 Insertion of Sensitive Information into Externally-Accessible File or Directory
References
-
ssd-disclosure.com
/ssd-advisory-tg8-firewall-preauth-rce-and-password-disclosure/
technical-description, exploit
-
web.archive.org
/web/20211024224240/http://www.tg8security.com/
product
-
vulncheck.com
/advisories/tg8-firewall-unauthenticated-user-password-disclosure
third-party-advisory
Sources
- CVE List CVE-2021-4471
- NVD CVE-2021-4471
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