CVE-2021-32013

Process interruption via crafted workbook memory exhaustion

Published Jul 19, 2021 · Updated Aug 3, 2024

Uncontrolled resource consumption in xlsx.js in SheetJS and SheetJS Pro through 0.16.9 allows attackers to exhaust memory via a crafted XLSX file. The XLSX reader mishandles the workbook during parsing and consumes memory without an effective bound; public records disclose no narrower function or data structure. User interaction is required to make the library read attacker-supplied workbook content, and the resulting memory exhaustion interrupts the host process.

CVSS severity5.5
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in xlsx.js in SheetJS and SheetJS Pro through 0.16.9 allows attackers to exhaust memory via a crafted XLSX file. The XLSX reader mishandles the workbook during parsing and consumes memory without an effective bound; public records disclose no narrower function or data structure. User interaction is required to make the library read attacker-supplied workbook content, and the resulting memory exhaustion interrupts the host process.

The record

CVE
CVE-2021-32013
Published
Jul 19, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
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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