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CVE-2021-27170

38
FAUCET Score

CVE-2021-27170 is a critical vulnerability affecting FiberHome HG6245D devices, including firmware up to RP2613. The flaw stems from a lack of default firewall rules for IPv6, which exposes internal management interfaces directly to the internet. With a CVSS score of 9.8 (CRITICAL), this vulnerability allows unauthenticated attackers to achieve full compromise (confidentiality, integrity, availability) with low attack complexity. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= rp2613CPE matchmatch criteria
cpe:2.3:o:fiberhome:hg6245d_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
15.95%
Probability of exploitation in next 30 days
EPSS Percentile
96.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1595 is in the 93rd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

pierrekim.github.io / blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html
ExploitThird Party Advisory