Is CVE-2021-27179 in the CISA KEV catalog?

No. CVE-2021-27179 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-27179?

CVE-2021-27179 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-27179?

CVE-2021-27179 has an EPSS score of 13.93% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2021-27179

HIGHEPSS 96th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to crash the telnet daemon by sending a certain 0a 65 6e 61 62 6c 65 0a 02 0a 1a 0a string.

CWE-20Improper Input Validation

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

13.93%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

https://pierrekim.github.io/blog/2021-01-12-fiberhome-ont-0day-vulnerabilities.html#telnet-cli-dos

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.