CVE-2017-8226: Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware

Q: How do I fix CVE-2017-8226?

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-2017-8226 being exploited?

CVE-2017-8226 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-2017-8226 affect?

CVE-2017-8226 affects ipm-721s firmware. Severity is critical (CVSS 9.8). Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware and can be extracted by anyone who reverses the firmware to identify them. If the firmware version V2.420.AC00.16.R 9/9/2016 is d

Q: How urgent is CVE-2017-8226?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2017-8226 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 default credentials that are hardcoded in the firmware and can be extracted by anyone who reverses the firmware to identify them. If the firmware version V2.420.AC00.16.R 9/9/2016 is dissected using binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that many of the binaries in the /usr folder. The binary "sonia" is the one t

Why this priority

Critical severity
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	3.8% (top 10%)
CISA exploited list	No
Weakness	CWE-798
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-2017-8226?

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

Is CVE-2017-8226 being exploited?

CVE-2017-8226 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-2017-8226 affect?

CVE-2017-8226 affects ipm-721s firmware. Severity is critical (CVSS 9.8). Amcrest IPM-721S V2.420.AC00.16.R.20160909 devices have default credentials that are hardcoded in the firmware and can be extracted by anyone who reverses the firmware to identify them. If the firmware version V2.420.AC00.16.R 9/9/2016 is d

How urgent is CVE-2017-8226?

Priority 67/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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