CVE-2022-35066Network attack vector

Process crash via heap buffer overflow

Published Sep 19, 2022 · Updated May 29, 2025

Heap buffer overflow in OTFCC commit 617837b allows attackers to crash otfccdump by processing a crafted OpenType font file. Public records identify the failure only by the otfccdump executable offset 0x6e41b8 and do not disclose the parser routine or unchecked write that corrupts heap memory. Exploitation requires a user to supply the crafted font to otfccdump, and the documented consequence is a process crash rather than data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.92%
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 commit 617837b allows attackers to crash otfccdump by processing a crafted OpenType font file. Public records identify the failure only by the otfccdump executable offset 0x6e41b8 and do not disclose the parser routine or unchecked write that corrupts heap memory. Exploitation requires a user to supply the crafted font to otfccdump, and the documented consequence is a process crash rather than data disclosure or modification.

The record

CVE
CVE-2022-35066
Published
Sep 19, 2022
Updated
May 29, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 19, 2022CVE publishedPublication date reported by the CVE source.
  2. May 29, 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

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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.

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

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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