CVE-2020-36278Network attack vector

Process crash via unchecked neighboring coordinates

Published Mar 11, 2021 · Updated Aug 4, 2024

Out-of-bounds read in Leptonica before 1.80.0 allows remote attackers to crash a consuming process through crafted image data. The findNextBorderPixel function in ccbord.c calculates neighboring pixel coordinates and reads from the backing bitmap without first rejecting coordinates outside its width and height. Exploitation requires attacker-controlled image data to reach a caller that traces connected-component borders; the demonstrated consequence is a process crash, with no integrity or confidentiality impact in the published assessment.

CVSS severity7.5
High
EPSS probability2.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Leptonica before 1.80.0 allows remote attackers to crash a consuming process through crafted image data. The findNextBorderPixel function in ccbord.c calculates neighboring pixel coordinates and reads from the backing bitmap without first rejecting coordinates outside its width and height. Exploitation requires attacker-controlled image data to reach a caller that traces connected-component borders; the demonstrated consequence is a process crash, with no integrity or confidentiality impact in the published assessment.

The record

CVE
CVE-2020-36278
Published
Mar 11, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 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

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5UbuntuCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

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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