CVE-2026-124561
D-Link DIR-878 HNAP prog.cgi SetVLANSettings stack-based overflow
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
D-Link DIR-878 HNAP prog.cgi SetVLANSettings stack-based overflow
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
- Record
CVE-2026-124561- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:X/RC:R - CVSS 2.0
- 7.8
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:POC/RL:ND/RC:UR - Weakness
- CWE-121, CWE-119
- Updated
- 2026-11-09
EUVDEUVD-2026-119787
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
- Record
EUVD-2026-119787- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P - Updated
- 2026-11-09
GitHub AdvisoriesGHSA-2q4f-mcgv-82h7
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function...
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
- Record
GHSA-2q4f-mcgv-82h7- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-09
NVD
A vulnerability was determined in D-Link DIR-878 1.20B05. This impacts the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. Executing a manipulation of the argument VID can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. This vulnerability only affects products that are no longer supported by the maintainer.
- Record
CVE-2026-124561- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-119, CWE-121
- Updated
- 2026-11-09
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references | GitHub Advisories | |
| cwes, references, severity, title | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-124561 is a high vulnerability (CVSS 8.7) in D-link Dir-878, published November 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. No source names a fixed version.