CVE-2017-8227: Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 inco

Q: How do I fix CVE-2017-8227?

ipm-721s firmware: upgrade to newer than 2.420.ac00.16.r.20160909. Exact commands for each OS are on this page.

Q: Is CVE-2017-8227 being exploited?

CVE-2017-8227 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-8227 affect?

CVE-2017-8227 affects ipm-721s firmware. Severity is critical (CVSS 9.8). Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 incorrect password attempts are detected using the Web and HTTP API interface provided by the device. However, if the same brute force

Q: How urgent is CVE-2017-8227?

Priority 67/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2017-8227 is a critical-severity flaw (CVSS 9.8) affecting ipm-721s firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 incorrect password attempts are detected using the Web and HTTP API interface provided by the device. However, if the same brute force attempt is performed using the ONVIF specification (which is supported by the same binary) then there is no account lockout or timeout executed. This can allow an attacker to circumvent the account protection

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.1% (top 9%)
CISA exploited list	No
Weakness	CWE-254
Published	2019-07-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: amcrest

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-03 20:15 UTCPublished CVE record published
2026-06-17 01:26 UTCUpdated Record last modified

amcrest ipm-721s firmware UPGRADE

Affected: <= 2.420.ac00.16.r.20160909

Fixed in: newer than 2.420.ac00.16.r.20160909

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-8227?

ipm-721s firmware: upgrade to newer than 2.420.ac00.16.r.20160909. Exact commands for each OS are on this page.

Is CVE-2017-8227 being exploited?

CVE-2017-8227 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-8227 affect?

CVE-2017-8227 affects ipm-721s firmware. Severity is critical (CVSS 9.8). Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have a timeout policy to wait for 5 minutes in case 30 incorrect password attempts are detected using the Web and HTTP API interface provided by the device. However, if the same brute force

How urgent is CVE-2017-8227?

Priority 67/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2017-8230 HIGH 8.8 UPGRADE On Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices, the users on the device are divided into 2 groups "admi
CVE-2017-8229 CRITICAL 9.8 UPGRADE Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices allow an unauthenticated attacker to download the administr
CVE-2017-8228 HIGH 8.8 UPGRADE Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices mishandle reboots within the past two hours
CVE-2017-8226 CRITICAL 9.8 UPGRADE Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware
CVE-2017-13719 CRITICAL 9.8 MITIGATE The Amcrest IPM-721S Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 allows HTTP requests that permit enablin

References

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