CVE-2021-0005

Service interruption via uncaught firmware exception

Published Aug 11, 2021 · Updated Aug 3, 2024

Uncaught firmware exception in Intel Ethernet 800 Series adapters before 1.5.3.0 allows local users to interrupt adapter service. Intel identifies the fault only as an uncaught exception in adapter firmware and does not disclose the triggering input, affected code path, or why the exception escapes. Exploitation requires high privileges and local host access; Intel characterizes the outcome as denial of service without stating whether the adapter hangs, resets, or crashes.

CVSS severity6.0
Medium
EPSS probability0.23%
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

Uncaught firmware exception in Intel Ethernet 800 Series adapters before 1.5.3.0 allows local users to interrupt adapter service. Intel identifies the fault only as an uncaught exception in adapter firmware and does not disclose the triggering input, affected code path, or why the exception escapes. Exploitation requires high privileges and local host access; Intel characterizes the outcome as denial of service without stating whether the adapter hangs, resets, or crashes.

The record

CVE
CVE-2021-0005
Published
Aug 11, 2021
Updated
Aug 3, 2024
Vendor
Intel Corporation
Product
Intel Ethernet 800 Series Network Adapters
Classifications
CWE-755, T1489
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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

  1. Affected versionversion=before version 1.5.3.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Intel Corporation · Intel Ethernet 800 Series Network Adaptersversion=before version 1.5.3.0

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:P
4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
6.0Intel CorporationCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1489Service Stop

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

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