CVE-2020-5735: Amcrest Cameras and NVR Stack-based Buffer Overflow Vulnerability

Q: How do I fix CVE-2020-5735?

1080-lite 8ch firmware: mitigate or apply the listed mitigation; amdv10814-h5 firmware: mitigate or apply the listed mitigation; ipm-721 firmware: upgrade to v2.420.ac00.18.r.20200217. Exact commands for each OS are on this page.

Q: Is CVE-2020-5735 being exploited?

Yes. CVE-2020-5735 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

Q: What does CVE-2020-5735 affect?

CVE-2020-5735 affects 1080-lite 8ch firmware, amdv10814-h5 firmware, ipm-721 firmware. Severity is high (CVSS 8.8). Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777. An authenticated remote attacker can abuse this issue to crash the device and possibly execute arbitrary code.

Q: How urgent is CVE-2020-5735?

Priority 85/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference

Patch now

HIGH 8.8EXPLOITEDMITIGATEMITIGATEUPGRADE

CVE-2020-5735 is a high-severity flaw (CVSS 8.8) affecting 1080-lite 8ch firmware, amdv10814-h5 firmware, ipm-721 firmware, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777. An authenticated remote attacker can abuse this issue to crash the device and possibly execute arbitrary code.

Why this priority

High severity
EPSS top 2%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	36.2% (top 2%)
CISA exploited list	Yes, fix due 2022-05-03
Weakness	CWE-121, CWE-787
Published	2020-04-08
Last modified	2026-06-17

Publisher (CNA): Tenable Network Security, Inc. · Vendor: amcrest

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

Am I affected?

Timeline

2020-04-08 13:15 UTCPublished CVE record published
2021-11-03Exploited Added to the CISA Known Exploited Vulnerabilities list
2022-05-03Deadline CISA due date for US federal agencies to patch
2026-06-17 03:22 UTCUpdated Record last modified

amcrest 1080-lite 8ch firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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.

amcrest amdv10814-h5 firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

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.

amcrest ipm-721 firmware UPGRADE

Affected: < v2.420.ac00.18.r.20200217

Fixed in: v2.420.ac00.18.r.20200217

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.

amcrest ip2m-841 firmware UPGRADE

Affected: < v2.420.ac00.18.r.20200217

Fixed in: v2.420.ac00.18.r.20200217

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.

amcrest ip2m-841-v3 firmware UPGRADE

Affected: < v2.800.0000000.6.r.200314

Fixed in: v2.800.0000000.6.r.200314

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.

amcrest ip2m-853ew firmware UPGRADE

Affected: < v2.623.00ac004.0.r.200316

Fixed in: v2.623.00ac004.0.r.200316

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · feh · FIXED · 3.13.1-1.fc46 · FEDORA-2026-3c76a13a4f · source

sudo dnf upgrade --advisory=FEDORA-2026-3c76a13a4f

Fedora ELN · setroubleshoot · FIXED · 3.3.37-7.eln159 · FEDORA-2026-f81b122fe1 · source

sudo dnf upgrade --advisory=FEDORA-2026-f81b122fe1

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: www.tenable.com/security/research/tra-2020-20
Exploit-DB: Amcrest Dahua NVR Camera IP2M-841 - Denial of Service (PoC)

Verify at the official source NVD · CVE Program · CISA KEV catalog · 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-2020-5735?

1080-lite 8ch firmware: mitigate or apply the listed mitigation; amdv10814-h5 firmware: mitigate or apply the listed mitigation; ipm-721 firmware: upgrade to v2.420.ac00.18.r.20200217. Exact commands for each OS are on this page.

Is CVE-2020-5735 being exploited?

Yes. CVE-2020-5735 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2020-5735 affect?

CVE-2020-5735 affects 1080-lite 8ch firmware, amdv10814-h5 firmware, ipm-721 firmware. Severity is high (CVSS 8.8). Amcrest cameras and NVR are vulnerable to a stack-based buffer overflow over port 37777. An authenticated remote attacker can abuse this issue to crash the device and possibly execute arbitrary code.

How urgent is CVE-2020-5735?

Priority 85/100. High severity; EPSS top 2%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference

Related CVEs

CVE-2020-5736 MEDIUM 6.5 MITIGATE MITIGATE Amcrest cameras and NVR are vulnerable to a null pointer dereference over port 37777

References

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