CVE-2025-44843: TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the CloudSrv

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MEDIUM 6.5REMOTEMITIGATE

CVE-2025-44843 is a medium-severity flaw (CVSS 6.5) affecting ca600-poe firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the CloudSrvUserdataVersionCheck function via the url parameter. This vulnerability allows attackers to execute arbitrary commands via a crafted request.

Why this priority

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	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 37%)
CISA exploited list	No
Weakness	CWE-77
Published	2025-05-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: totolink

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

Am I affected?

Timeline

2025-05-01 17:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

totolink ca600-poe firmware MITIGATE

Affected: 5.3c.6665_b20180820*

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-2025-44843?

ca600-poe firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-44843 being exploited?

CVE-2025-44843 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-2025-44843 affect?

CVE-2025-44843 affects ca600-poe firmware. Severity is medium (CVSS 6.5). TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the CloudSrvUserdataVersionCheck function via the url parameter. This vulnerability allows attackers to execute arbitrary commands via a craft

How urgent is CVE-2025-44843?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-44848 MEDIUM 6.5 MITIGATE TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the msg_proc
CVE-2025-44847 MEDIUM 6.3 MITIGATE TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the setWebWl
CVE-2025-44846 MEDIUM 6.3 MITIGATE TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the recvUpgr
CVE-2025-44845 MEDIUM 6.5 MITIGATE TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the NTPSyncW
CVE-2025-44844 MEDIUM 6.5 MITIGATE TOTOLINK CA600-PoE V5.3c.6665_B20180820 was found to contain a command injection vulnerability in the setUpgra

References

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