CVE-2021-27177
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass...
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
- Record
CVE-2021-27177- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-863
- Updated
- 2026-11-02
CVE List No score
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
- Record
CVE-2021-27177- Updated
- 2026-11-02
EUVDEUVD-2021-13944 No score
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
- Record
EUVD-2021-13944- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vg7p-2967-p5p3 No score
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass...
An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to bypass authentication by sending the decoded value of the GgpoZWxwCmxpc3QKd2hvCg== string to the telnet server.
- Record
GHSA-vg7p-2967-p5p3- Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | krevetkqqq/CVE-2021-27177 | 2026-10-30 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27177 is a critical vulnerability (CVSS 9.8) in Fiberhome Hg6245d Firmware, published February 10, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 20.0%, the 97th percentile. No source names a fixed version.