CVE-2025-6121

D-Link Dir-632 Firmware buffer overflow

9.8 CRITICALPublic exploitEPSS 2.78%

Published16 Jun 2025

Description

A vulnerability, which was classified as critical, has been found in D-Link DIR-632 FW103B08. Affected by this issue is the function get_pure_content of the component HTTP POST Request Handler. The manipulation of the argument Content-Length leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

D-Link Dir-632 Firmware103b08

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/xiaobor123/vul-finds/tree/main/vul-find-dir632-dlink-get_pure_contentExploitThird Party Advisory
https://github.com/xiaobor123/vul-finds/tree/main/vul-find-dir632-dlink-get_pure_content#pocExploitThird Party Advisory
https://vuldb.com/?ctiid.312590Permissions Required
https://vuldb.com/?id.312590Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.592574Third Party AdvisoryVDB Entry
https://www.dlink.com/Product

Related CVEs

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Frequently asked

Is CVE-2025-6121 being actively exploited?

CVE-2025-6121 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 2.78%.

How severe is CVE-2025-6121?

CVE-2025-6121 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.78% probability of exploitation.

Which products are affected by CVE-2025-6121?

Affected products include D-Link Dir-632 Firmware.

How do I fix CVE-2025-6121?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-6121 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.