CVE-2024-3272 — Dns-320l Firmware
CRITICALCVE-2024-3272 is a critical-severity (CVSS 9.8) Hard-coded Credentials vulnerability in dlink dns-320l firmware. It is in CISA's Known Exploited Vulnerabilities catalog (added 2024-04-11) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed below.
** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as very critical, has been found in D-Link DNS-320L, DNS-325, DNS-327L and DNS-340L up to 20240403. This issue…
Exploitation Status
Actively exploited in the wild
- Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2024-04-11. Federal agencies were required to remediate by 2024-05-02.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2024-3272.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2024-3272 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).
Where this sits among everything scored
Of 394,803 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.
Description
** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as very critical, has been found in D-Link DNS-320L, DNS-325, DNS-327L and DNS-340L up to 20240403. This issue affects some unknown processing of the file /cgi-bin/nas_sharing.cgi of the component HTTP GET Request Handler. The manipulation of the argument user with the input messagebus leads to hard-coded credentials. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-259283. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: Vendor was contacted early and confirmed immediately that the product is end-of-life. It should be retired and replaced.
Affected Products
dns-320l firmwaredlinkdns-325 firmwaredlinkdns-327l firmwaredlinkdns-340l firmwaredlinkResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every dlink dns-320l firmware deployment and check each version against the affected-products list above.
Remediation status
No patch has shipped for CVE-2024-3272 yet — track the dlink dns-320l firmware advisory for a fixed release and apply the workarounds below in the meantime.
Mitigate without a patch
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
How to detect CVE-2024-3272
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id cve-2024-3272 -u https://target- Template
- D-Link Network Attached Storage - Backdoor Account
- Severity
- critical
- Impact
- Attackers can use hardcoded credentials to gain unauthorized access to D-Link NAS devices and execute commands.
- Remediation
- Update D-Link NAS firmware to a version that removes the backdoor account.
Template by ProjectDiscovery nuclei-templates (ritikchaddha), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is CVE-2024-3272 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.