CVE-2022-35039Public exploitNetwork attack vector

Process crash via otfccdump heap overflow

Published Sep 22, 2022 · Updated May 27, 2025

Heap buffer overflow in OTFCC otfccdump at commit 617837b allows context-dependent attackers to crash it with a crafted OpenType font. The public report identifies only the failing otfccdump binary offset and does not disclose the parser routine, malformed field, or missing bounds operation. Exploitation requires a user to run otfccdump on an attacker-controlled font, and the demonstrated consequence is termination of that command-line process.

CVSS severity6.5
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in OTFCC otfccdump at commit 617837b allows context-dependent attackers to crash it with a crafted OpenType font. The public report identifies only the failing otfccdump binary offset and does not disclose the parser routine, malformed field, or missing bounds operation. Exploitation requires a user to run otfccdump on an attacker-controlled font, and the demonstrated consequence is termination of that command-line process.

The record

CVE
CVE-2022-35039
Published
Sep 22, 2022
Updated
May 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 22, 2022CVE publishedPublication date reported by the CVE source.
  2. May 27, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

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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