CVE-2021-32435Public exploit

Application crash via oversized key signature

Published Mar 10, 2022 · Updated Aug 3, 2024

Stack buffer overflow in abcm2ps 8.14.11 allows context-dependent attackers to crash the converter via a crafted ABC music file. The set_k_acc function copies a key signature with an sf value above seven into fixed eight-byte accs and pits stack arrays, writing past their bounds. The target must process attacker-supplied ABC notation; the demonstrated consequence is an application crash under stack protection.

CVSS severity5.5
Medium
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in abcm2ps 8.14.11 allows context-dependent attackers to crash the converter via a crafted ABC music file. The set_k_acc function copies a key signature with an sf value above seven into fixed eight-byte accs and pits stack arrays, writing past their bounds. The target must process attacker-supplied ABC notation; the demonstrated consequence is an application crash under stack protection.

The record

CVE
CVE-2021-32435
Published
Mar 10, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 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?

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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5NIST NVDCVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

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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