CVE-2021-33651Network attack vector

Model-analysis interruption via zero depth multiplier

Published Jun 27, 2022 · Updated Aug 3, 2024

Divide-by-zero in MindSpore allows attackers to interrupt model analysis by supplying a DepthwiseConv2D operator with a zero depth multiplier. During analytical execution, the operator uses the unchecked depth_multiplier attribute as a divisor, so a zero value raises a division-by-zero exception. The affected range starts at 1.1.0 and ends before 1.3.0; reachability requires a consuming application to analyze attacker-influenced operator data.

CVSS severity7.5
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in MindSpore allows attackers to interrupt model analysis by supplying a DepthwiseConv2D operator with a zero depth multiplier. During analytical execution, the operator uses the unchecked depth_multiplier attribute as a divisor, so a zero value raises a division-by-zero exception. The affected range starts at 1.1.0 and ends before 1.3.0; reachability requires a consuming application to analyze attacker-influenced operator data.

The record

CVE
CVE-2021-33651
Published
Jun 27, 2022
Updated
Aug 3, 2024
Vendor
MindSpore
Product
MindSpore
Classifications
CWE-369, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2022CVE 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=>= 1.1.0, < 1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · MindSporeversion=>= 1.1.0, < 1.3.0

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS: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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-369Divide By Zero
T1499.004Application 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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