CVE-2020-27279Network attack vector

Device reboot via malformed protocol-converter packet

Published Jan 6, 2021 · Updated Jun 2, 2026

NULL pointer dereference in Red Lion Controls Crimson 3.1 before build 3119.001 allows remote attackers to reboot DA10D protocol converters. The protocol converter dereferences a NULL pointer while processing a specially crafted network packet; no public source names a narrower code locus. No authentication or user interaction is required, and exploitation interrupts device availability through a reboot without reported data access or modification.

CVSS severity7.5
High
EPSS probability1.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Red Lion Controls Crimson 3.1 before build 3119.001 allows remote attackers to reboot DA10D protocol converters. The protocol converter dereferences a NULL pointer while processing a specially crafted network packet; no public source names a narrower code locus. No authentication or user interaction is required, and exploitation interrupts device availability through a reboot without reported data access or modification.

The record

CVE
CVE-2020-27279
Published
Jan 6, 2021
Updated
Jun 2, 2026
Vendor
Red Lion Controls
Product
Crimson
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Build versions prior to 3119.001

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Lion Controls · Crimsonversion=Build versions prior to 3119.001

Published CVSS scores

7.5CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8NVDAV:N/AC:L/Au:N/C:N/I:N/A:C

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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