CVE-2019-15654: Comba AC2400 devices are prone to password disclosure via a simple crafted /09/business/upgrade/upcfgAction.ph

This week

HIGH 7.5REMOTEMITIGATE

CVE-2019-15654 is a high-severity flaw (CVSS 7.5) affecting ac2400 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Comba AC2400 devices are prone to password disclosure via a simple crafted /09/business/upgrade/upcfgAction.php?download=true request to the web management server. The request doesn't require any authentication and will lead to saving the DBconfig.cfg file. At the end of the file, the login information is stored in cleartext.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-306
Published	2020-03-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: comba

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

Am I affected?

Timeline

2020-03-19 18:15 UTCPublished CVE record published
2026-06-17 02:20 UTCUpdated Record last modified

comba ac2400 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.

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-2019-15654?

ac2400 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-15654 being exploited?

CVE-2019-15654 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-2019-15654 affect?

CVE-2019-15654 affects ac2400 firmware. Severity is high (CVSS 7.5). Comba AC2400 devices are prone to password disclosure via a simple crafted /09/business/upgrade/upcfgAction.php?download=true request to the web management server. The request doesn't require any authentication and will lead to saving the D

How urgent is CVE-2019-15654?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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