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Classic Buffer OverflowWeakness · CWE-120

CVE-2024-7849

HIGH · 8.8 CVSS v3.1 Published 2024-08-16
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
94/100
Remediation priority · Urgent
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as critical, was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 and DNS-1550-04 up to 20240814. This affects the function cgi_create_album of the file /cgi-bin/photocenter_mgr.cgi. The manipulation of the argument current_path leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: Vendor was contacted early and confirmed that the product is end-of-life. It should be retired and replaced.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Buffer overflow vulnerability in D-Link NAS devices (multiple models) in the cgi_create_album function of photocenter_mgr.cgi. The current_path argument is not properly bounds-checked, allowing an attacker to overflow the buffer and potentially achieve remote code execution. The CVSS 8.8 indicates low attack complexity with high exploitability.

MitigationThese are end-of-life products with no vendor patches available. The devices should be retired and replaced. If immediate replacement is not possible, network isolation and restricting access to trusted IP addresses only may reduce exposure.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify D-Link NAS device model
    Access the device web interface or check the device label/menu for the exact model number (e.g., DNS-320, DNS-325, DNS-340L, etc.)
    Affected if The device is one of the affected D-Link NAS models listed in the product compatibility documentation for this CVE
  2. Verify photocenter_mgr.cgi is present
    Attempt to access the CGI binary via HTTP/HTTPS (e.g., http://<device-ip>/cgi-bin/photocenter_mgr.cgi) or check the device firmware filesystem if shell access is available
    Affected if The photocenter_mgr.cgi file exists and is accessible on the device
  3. Confirm photo center feature is enabled
    Check the device web interface under Applications or Photo Center settings to see if the photo album/center feature is turned on
    Affected if The photo center or photo album feature is enabled in the device configuration
  4. Check network exposure
    Determine if the device management interface (HTTP/HTTPS ports 80/443) is exposed to the internet or untrusted networks by reviewing firewall rules, port forwarding configurations, or router NAT settings
    Affected if The device is directly accessible from the internet or from untrusted network segments
  5. Review access logs for photocenter_mgr.cgi
    If logging is enabled, examine web server access logs or device logs for requests to the cgi_create_album function or unusual activity targeting photocenter_mgr.cgi
    Affected if There are anomalous or suspicious requests to the vulnerable CGI endpoint in the logs

The environment is affected if it contains an end-of-life D-Link NAS device with the photocenter_mgr.cgi interface exposed to untrusted networks and the photo center feature enabled.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

These are end-of-life products with no vendor patches available. The devices should be retired and replaced. If immediate replacement is not possible, network isolation and restricting access to trusted IP addresses only may reduce exposure.

Recommended fix High confidence
  1. These D-Link devices (DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05, DNS-1550-04) are end-of-life and no longer supported by D-Link. No security patches or firmware updates will be released.
  2. Replace the affected devices with newer, actively supported hardware from D-Link or an alternative vendor.
  3. If immediate replacement is not possible, disable the photocenter_mgr.cgi CGI functionality or the entire photo center feature if not required.
  4. If the photo center feature is required, implement network segmentation (VLAN) to isolate these devices from untrusted networks.
  5. Configure firewall rules to block external access to the device's web interface (ports 80/443) from the internet.
Caveat End-of-life devices cannot be upgraded; they must be replaced with supported hardware. D-Link has confirmed these products should be retired.

Generated from the published advisory — verify against the referenced sources before acting.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing3.0 h
  • Review / QA2.0 h
17.0 hours of engineering $3,050
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-7849 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
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  • Version or environment caveats, and links to real fixes
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