CVE-2021-26251Network attack vector

Authenticated denial of service via improper input validation

Published Nov 11, 2022 · Updated Feb 5, 2025

Improper input validation in OpenVINO Toolkit before 2021.4.2 allows remote authenticated users to cause denial of service via network access. Intel has not publicly identified the input-processing component or described the malformed network data operation that triggers the failure. An authenticated network user can reach the condition, which interrupts service availability; confidentiality and integrity impact are not reported.

CVSS severity5.3
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in OpenVINO Toolkit before 2021.4.2 allows remote authenticated users to cause denial of service via network access. Intel has not publicly identified the input-processing component or described the malformed network data operation that triggers the failure. An authenticated network user can reach the condition, which interrupts service availability; confidentiality and integrity impact are not reported.

The record

CVE
CVE-2021-26251
Published
Nov 11, 2022
Updated
Feb 5, 2025
Vendor
Topcon Positioning Systems, Inc.
Product
OpenVINO Toolkit
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Feb 5, 2025Record 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=See references

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Topcon Positioning Systems, Inc. · OpenVINO Toolkitversion=See references

Published CVSS scores

5.3Intel CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5NVDCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
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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