CVE-2020-15833Network attack vector

Root access via immutable alternate SSH key

Published Feb 1, 2021 · Updated Aug 4, 2024

Authentication bypass in Mofi Network MOFI4500-4GXeLTE 4.1.5-std allows remote attackers to obtain root access over SSH. The modified Dropbear daemon checks an alternate hard-coded /rom path for an authorized public key that the device owner cannot replace. Possession of the matching private key permits network login as root, exposing all router data and commands.

CVSS severity9.8
Critical
EPSS probability1.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Mofi Network MOFI4500-4GXeLTE 4.1.5-std allows remote attackers to obtain root access over SSH. The modified Dropbear daemon checks an alternate hard-coded /rom path for an authorized public key that the device owner cannot replace. Possession of the matching private key permits network login as root, exposing all router data and commands.

The record

CVE
CVE-2020-15833
Published
Feb 1, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-798, CAPEC-70, CAPEC-191, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
CAPEC-70Try Common or Default Usernames and Passwords
CAPEC-191Read Sensitive Constants Within an Executable
T1078.001Valid Accounts: Default Accounts

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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