CVE-2020-14098Network attack vector

Unauthenticated login bypass via post-reboot clock desynchronization

Published Jan 13, 2021 · Updated Aug 4, 2024

Authentication bypass in Xiaomi Mi Router AX1800 firmware before 1.0.336 allows remote attackers to pass login verification after a restart. After the router restarts, its unsynchronized system time is used incorrectly during login verification, permitting requests that should fail authentication. The attacker must reach the management interface during the post-restart time-skew window; successful exploitation grants unauthorized management access.

CVSS severity7.5
High
EPSS probability1.22%
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 Xiaomi Mi Router AX1800 firmware before 1.0.336 allows remote attackers to pass login verification after a restart. After the router restarts, its unsynchronized system time is used incorrectly during login verification, permitting requests that should fail authentication. The attacker must reach the management interface during the post-restart time-skew window; successful exploitation grants unauthorized management access.

The record

CVE
CVE-2020-14098
Published
Jan 13, 2021
Updated
Aug 4, 2024
Vendor
Xiaomi Corporation
Product
Mi Router AX1800 Firmware
Classifications
CWE-662, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Xiaomi router AX1800rom version < 1.0.336
  2. Affected versionversion=Xiaomi route RM1800 root version < 1.0.26

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Xiaomi Corporation · Mi Router AX1800 Firmwareversion=Xiaomi router AX1800rom version < 1.0.336; version=Xiaomi route RM1800 root version < 1.0.26

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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-662Improper Synchronization
T1190Exploit Public-Facing Application

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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