CVE-2020-21627Network attack vector

Unauthenticated service interruption via reboot endpoint

Published Nov 16, 2021 · Updated Aug 4, 2024

Denial of service in Ruijie RG-UAC commit 9071227 allows remote attackers to interrupt service through the reboot action endpoint. The public disclosure identifies /current_action.php?action=reboot but does not describe the wrong operation or crafted input that triggers the interruption. No authentication or user interaction is required; available evidence does not distinguish whether exploitation causes a hang, crash, or reboot.

CVSS severity7.5
High
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Ruijie RG-UAC commit 9071227 allows remote attackers to interrupt service through the reboot action endpoint. The public disclosure identifies /current_action.php?action=reboot but does not describe the wrong operation or crafted input that triggers the interruption. No authentication or user interaction is required; available evidence does not distinguish whether exploitation causes a hang, crash, or reboot.

The record

CVE
CVE-2020-21627
Published
Nov 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 16, 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

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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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