CVE-2020-12866Public exploit

Application crash via NULL network buffer dereference

Published Jun 24, 2020 · Updated Aug 4, 2024

NULL pointer dereference in SANE Backends before 1.0.30 allows remote attackers to crash scanner applications on the same network. The epsonds_net_read function trusts the payload size in a scanner response and reads it through a NULL s->netbuf pointer when the size differs from the requested length. Opening simple-scan triggers network discovery without user interaction, and the malformed response terminates the application with a segmentation fault.

CVSS severity5.7
Medium
EPSS probability1.04%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in SANE Backends before 1.0.30 allows remote attackers to crash scanner applications on the same network. The epsonds_net_read function trusts the payload size in a scanner response and reads it through a NULL s->netbuf pointer when the size differs from the requested length. Opening simple-scan triggers network discovery without user interaction, and the malformed response terminates the application with a segmentation fault.

The record

CVE
CVE-2020-12866
Published
Jun 24, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 24, 2020CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.7NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.7NIST NVDAV:A/AC:L/Au:S/C:N/I:N/A:P
5.7Canonical UbuntuCVSS:3.1/AV:A/AC:L/PR:L/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)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo