CVE-2016-6563
CriticalExploitedPublic exploitProcessing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers.
Published Jul 13, 2018 · Updated Nov 20, 2024
Key Facts
Patch immediately- CVE-2016-6563 is a critical-severity vulnerability (CVSS 9.8 v3) affecting Dir-818l\(w\) Firmware (Dlink), Dir-822 Firmware (Dlink), Dir-823 Firmware (Dlink) and 15 more products.
- It is exploited in the wild, listed in Industry KEV feed since Feb 27, 2025. Public exploit code is available.
- EPSS estimates a 80% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
80%
Higher than 99.6% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2016-6563 brief as a PDF
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Description
Processing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers. The vulnerable XML fields within the SOAP body are: Action, Username, LoginPassword, and Captcha. The following products are affected: DIR-823, DIR-822, DIR-818L(W), DIR-895L, DIR-890L, DIR-885L, DIR-880L, DIR-868L, and DIR-850L.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Feb 27, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
18 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Dir-818l\(w\) FirmwareDlink | See advisory | n/a |
| Dir-822 FirmwareDlink | See advisory | n/a |
| Dir-823 FirmwareDlink | See advisory | n/a |
| Dir-850l FirmwareDlink | See advisory | n/a |
| Dir-868l FirmwareDlink | See advisory | n/a |
Timeline
Publicly disclosed
Jul 13, 2018
Last updated
Nov 20, 2024
Added to Industry KEV feed
Feb 27, 2025
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-121 Stack-based Buffer Overflow
References
- advisoryVU#677427
- advisory94130
- exploit20161107 [CVE-2016-6563 / VU#677427]: Dlink DIR routers HNAP Login stack buffer overflow
- exploitMSF dlink_hnap_login_bof.rb
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Processing malformed SOAP messages when performing the HNAP Login action causes a buffer overflow in the stack in some D-Link DIR routers.
Affected: Dir-818l\(w\) Firmware (Dlink); Dir-822 Firmware (Dlink); Dir-823 Firmware (Dlink), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Feb 27, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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