CVE-2021-27172 in the critical feed json
An issue was discovered on FiberHome HG6245D devices through RP2613.
published 2021-02-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13939
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 19.6%
- EPSS 19.6% chance of exploitation in 30 days, percentile 97%
- public exploits
- 0
- none known
Summary
An issue was discovered on FiberHome HG6245D devices through RP2613. A hardcoded GEPON password for root is defined inside /etc/init.d/system-config.sh.
Exploit prediction
19.56% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- pierrekim.github.io https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-linux-hardcoded-credentials referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-798 Use of Hard-coded Credentials
References
-
pierrekim.github.io
/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-linux-hardcoded-credentials
exploit, third-party-advisory
Sources
- CVE List CVE-2021-27172
- NVD CVE-2021-27172
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.