CVE-2021-22366

Process denial of service via internal-message out-of-bounds read

Published Jun 22, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Huawei eSE620X vESS allows local users to interrupt a system process via a crafted internal message. An undisclosed internal-message handling function reads beyond the supplied message boundary while processing the crafted interprocess message. The attacker must log in locally and send messages between system processes; the reported consequence is process denial of service only.

CVSS severity4.0
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Huawei eSE620X vESS allows local users to interrupt a system process via a crafted internal message. An undisclosed internal-message handling function reads beyond the supplied message boundary while processing the crafted interprocess message. The attacker must log in locally and send messages between system processes; the reported consequence is process denial of service only.

The record

CVE
CVE-2021-22366
Published
Jun 22, 2021
Updated
Aug 3, 2024
Vendor
Huawei
Product
eSE620X vESS
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=V100R001C10SPC200,V100R001C20SPC200,V200R001C00SPC300

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Huawei · eSE620X vESSversion=V100R001C10SPC200,V100R001C20SPC200,V200R001C00SPC300

Published CVSS scores

3.7HuaweiCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C
4.0HuaweiCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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