CVE-2020-25784: An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 thro

Q: How do I fix CVE-2020-25784?

720p firmware: upgrade to newer than 4.15.77. Exact commands for each OS are on this page.

Q: Is CVE-2020-25784 being exploited?

CVE-2020-25784 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-2020-25784 affect?

CVE-2020-25784 affects 720p firmware. Severity is critical (CVSS 9.8). An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 through v4.15.77. There is an unauthenticated stack-based buffer overflow in the function CNetClientGuard::SubOprMsg during incoming m

Q: How urgent is CVE-2020-25784?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2020-25784 is a critical-severity flaw (CVSS 9.8) affecting 720p firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 through v4.15.77. There is an unauthenticated stack-based buffer overflow in the function CNetClientGuard::SubOprMsg during incoming message handling.

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	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-01-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: accfly

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

Am I affected?

Timeline

2021-01-28 03:15 UTCPublished CVE record published
2026-06-17 03:07 UTCUpdated Record last modified

accfly 720p firmware UPGRADE

Affected: >= 3.10.73 and <= 4.15.77

Fixed in: newer than 4.15.77

Safe to downgrade to: a release before 3.10.73

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-2020-25784?

720p firmware: upgrade to newer than 4.15.77. Exact commands for each OS are on this page.

Is CVE-2020-25784 being exploited?

CVE-2020-25784 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-2020-25784 affect?

CVE-2020-25784 affects 720p firmware. Severity is critical (CVSS 9.8). An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 through v4.15.77. There is an unauthenticated stack-based buffer overflow in the function CNetClientGuard::SubOprMsg during incoming m

How urgent is CVE-2020-25784?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-25785 CRITICAL 9.8 UPGRADE An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 thro
CVE-2020-25783 CRITICAL 9.8 UPGRADE An issue was discovered on Accfly Wireless Security IR Camera System 720P with software versions v3.10.73 thro
CVE-2020-25782 CRITICAL 9.8 UPGRADE An issue was discovered on Accfly Wireless Security IR Camera 720P System with software versions v3.10.73 thro

References

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