CVE-2020-18428Public exploitNetwork attack vector

Process crash via zero-width image encoding

Published Jul 26, 2021 · Updated Aug 4, 2024

Array index error in TinyEXR 0.9.5 allows remote attackers to crash a consuming process through a zero-width image passed to SaveEXR. SaveEXR accesses the first element of an empty float vector when the supplied image width is zero, causing an out-of-range exception that terminates the process. Reachability requires a consuming application to pass attacker-controlled image dimensions into SaveEXR; the demonstrated consequence is a process crash.

CVSS severity7.5
High
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Array index error in TinyEXR 0.9.5 allows remote attackers to crash a consuming process through a zero-width image passed to SaveEXR. SaveEXR accesses the first element of an empty float vector when the supplied image width is zero, causing an out-of-range exception that terminates the process. Reachability requires a consuming application to pass attacker-controlled image dimensions into SaveEXR; the demonstrated consequence is a process crash.

The record

CVE
CVE-2020-18428
Published
Jul 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-129, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1499.004Application or System Exploitation

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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