CVE-2024-7463: A vulnerability classified as critical was found in TOTOLINK CP900 6.3c.566

This week

HIGH 8.8MITIGATE

CVE-2024-7463 is a high-severity flaw (CVSS 8.8) affecting cp900 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability classified as critical was found in TOTOLINK CP900 6.3c.566. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument File leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-273556. NOTE: The vendor was contacted early about this disclosure but d

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	11.0% (top 4%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-08-05
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: totolink

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

Am I affected?

Timeline

2024-08-05 01:16 UTCPublished CVE record published
2026-06-17 08:20 UTCUpdated Record last modified

totolink cp900 firmware MITIGATE

Affected: 6.3c.566

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.3c.566

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-2024-7463?

cp900 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-7463 being exploited?

CVE-2024-7463 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-2024-7463 affect?

CVE-2024-7463 affects cp900 firmware. Severity is high (CVSS 8.8). A vulnerability classified as critical was found in TOTOLINK CP900 6.3c.566. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument File leads to buffer overflow. The at

How urgent is CVE-2024-7463?

Priority 60/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2025-44854 MEDIUM 6.3 MITIGATE TOTOLINK CP900 V6.3c.1144_B20190715 was found to contain a command injection vulnerability in the setUpgradeUb
CVE-2025-44838 MEDIUM 6.3 MITIGATE TOTOLINK CPE CP900 V6.3c.1144_B20190715 was discovered to contain a command injection vulnerability in the set
CVE-2025-44837 MEDIUM 6.3 MITIGATE TOTOLINK CPE CP900 V6.3c.1144_B20190715 was discovered to contain a command injection vulnerability in the Clo
CVE-2025-44836 MEDIUM 6.3 MITIGATE TOTOLINK CPE CP900 V6.3c.1144_B20190715 was discovered to contain a command injection vulnerability in the set
CVE-2024-7464 MEDIUM 6.3 MITIGATE A vulnerability, which was classified as critical, has been found in TOTOLINK CP900 6.3c.566

References

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