Overview  

The D-Link DIR-825 WiFi Router  all hardware revisions, are legacy devices as listed below in the table. All hardware revisions, have reached their End of Life ("EOL") /End of Service Life ("EOS") Life-Cycle.  D-Link US recommends D-Link devices that have reached EOL/EOS, to be retired and replaced. Please contact your regional office for recommendations (LINK). 

As a  general policy, when products reach EOS/EOL, they can no longer be supported, and all firmware development for these products cease.  Please read information and recommendations below.
  

3rd Party Report information

Details : Reported 06/09/2023
 

Incident #1: Arizona State University, Laboratory of Security Engineering for Future Computing  (SEFCOM)

                     Hui Jun Tay :: hui _dot_ jun_dot_ tay _at_ gmail _dot_ com

                     Kyle Zeng :: zengyhkyle _at_ asu _dot_ edu

                     Jayakrishna Vadayath :: jvadayat _at_ asu _dot_ edu

                     Fish Wang :: fishw _at_ asu _dot_ edu

                     Yan Shoshitaishvili :: yans _at_ asu _dot_ edu

                     Adam Doupé :: doupe _at_ asu _dot_ edu

                    DIR-825 (v2.09EU Build: 09beta03) reference: /sbin/httpd
                    - Report #1: Stack overflow via strcat() at 0x4070e0 in do_file()

                    - Report #2: memcpy() at 0x408b50 copies user input into fixed size heap buffer and overflows it

Incident #2: Sejong University, Intelligence Security Lab. (ISEC)

                       Juhwan Kim, Ph.D. :: juhwan _at_ sju _dot_ ac _dot_ kr

                                Reported: 06/12/2024 :: Link to Public Disclosure

                      DIR-825 (H/W Rev. Bx F/W v2.10) stack-based buffer overflow

                     - Report #3: vulnerability found in the DIR-825 firmware, version Rev.B 2.10. This critical vulnerability is located within the /sbin/httpd file. It can be exploited to execute arbitrary code through the manipulation of the URI in the GET method of an HTTP request. A successful attack would enable the control of the registers $s0 to $s8, $ra, and $sp by sending a specially crafted HTTP request packet to the httpd process.

Report 4: (06/20/2025) 

            Author(s):

xiaobor123  – VULdb Disclosure

Disclosure:  CVE-2025-6291 : (Link) : D-Link DIR-825 HTTP POST Request do_file stack-based overflow

Description: A vulnerability, which was classified as critical, was found in D-Link DIR-825 2.03. This affects the function do_file of the component HTTP POST Request Handler. The manipulation leads to a stack-based buffer overflow.

         CWE: CWE-121: Stack-based Buffer Overflow / CWE-119: Memory Corruption

         CVSS:

Affected: All models, Derivative Models, All Revisions, and All Firmware

Report 5: (06/20/2025) 

            Author(s):

xiaobor123  – VULdb Disclosure

Disclosure:  CVE-2025-6292 : (Link) : D-Link DIR-825 HTTP POST Request sub_4091AC stack-based overflow

Description: A vulnerability has been found in D-Link DIR-825 2.03 and classified as critical. This vulnerability affects the function sub_4091AC of the component HTTP POST Request Handler. The manipulation leads to a stack-based buffer overflow.

         CWE: CWE-121: Stack-based Buffer Overflow / CWE-119: Memory Corruption

         CVSS:

Affected: All models, Derivative Models, All Revisions, and All Firmware

Accused Model

 ** H/W revision Jx is still available in some non-US regions, it is not affected by this vulnerability.

Recommendation for End of Support /End of Life Products

  
From time to time, D-Link will decide that some of its products have reached End of Support ("EOS") / End of Life (“EOL”). D-Link may choose to EOS/EOL a product due to evolution of technology, market demands,  new innovations, product efficiencies based on new technologies, or the product matures over time and should be replaced by functionally superior technology.

For US Consumer

If a product has reached End of Support ("EOS") / End of Life ("EOL"), there is normally no further extended support or development for it.

Typically for these products, D-Link will be unable to resolve device or firmware issues since all development and customer support has ceased. 

D-Link strongly recommends that this product be retired and cautions that any further use of this product may be a risk to devices connected to it. If US consumers continue to use these devices against D-Link's recommendation, please make sure the device has the most recent firmware, make sure you frequently update the device's unique password to access its web-configuration, and always have WIFI encryption enabled with a unique password.