Skip to content
CVE Tracker
Back

CVE-2022-25217

Use of a hard-coded cryptographic key pair by the telnetd_startup service allows an attacker on the local area network to obtain a root…

High7.8EPSS 0.33%
Published
Updated
Reserved
Assigned by
tenable

Description

Use of a hard-coded cryptographic key pair by the telnetd_startup service allows an attacker on the local area network to obtain a root shell on the device over telnet. The builds of telnetd_startup included in the version 22.5.9.163 of the K2 firmware, and version 32.1.15.93 of the K3C firmware (possibly amongst many other releases) included both the private and public RSA keys. The remaining versions cited here redacted the private key, but left the public key unchanged. An attacker in possession of the leaked private key may, through a scripted exchange of UDP packets, instruct telnetd_startup to spawn an unauthenticated telnet shell as root, by means of which they can then obtain complete control of the device. A consequence of the limited availablility of firmware images for testing is that models and versions not listed here may share this vulnerability.

Scores

CVSS scores of CVE-2022-25217, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.33% · top 74% of all CVEs (2 Nov 2026)

Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

Affected products

  • Phicomm Routers

    • affected K2 22.5.9.163, K3 21.5.37.246, K3C 32.1.15.93 -- 32.1.26.175, K3C 33.1.25.177, K2P 20.4.1.7, K2 A7 22.6.506.28

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .