CVE-2021-33653Network attack vector

Process crash via zero SpaceToBatch block shape

Published Jun 27, 2022 · Updated Aug 3, 2024

Divide-by-zero in Huawei MindSpore before 1.3.0 allows attackers to crash a process when a crafted SpaceToBatch operator is shape-checked. The SpaceToBatch shape-derivation path uses each block_shape element as a divisor without rejecting a zero value. Exploitation requires an affected application to process attacker-controlled operator parameters; the bounded consequence is interruption of that process.

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 Huawei MindSpore before 1.3.0 allows attackers to crash a process when a crafted SpaceToBatch operator is shape-checked. The SpaceToBatch shape-derivation path uses each block_shape element as a divisor without rejecting a zero value. Exploitation requires an affected application to process attacker-controlled operator parameters; the bounded consequence is interruption of that process.

The record

CVE
CVE-2021-33653
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=>= 0.7.0-beta, < 1.3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MindSpore · MindSporeversion=>= 0.7.0-beta, < 1.3.0

Published CVSS scores

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.

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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-369Divide By Zero
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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