D-Link DIR-878 1.20B05 HNAP prog.cgi SetVLANSettings VID stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.8$0-$5k0.00+

Summaryinfo

A vulnerability classified as critical has been found in D-Link DIR-878 1.20B05. Affected is the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. The manipulation of the argument VID leads to stack-based overflow. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is listed as CVE-2026-124561. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in D-Link DIR-878 1.20B05. This issue affects the function SetVLANSettings of the file prog.cgi of the component HNAP Handler. The manipulation of the argument VID with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. The product writes past the end of a buffer that was allocated on the stack. Impacted is availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-124561. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/08/2026).

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.5
VulDB Temp Score: 6.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/08/2026 Advisory disclosed
11/08/2026 +0 days VulDB entry created
11/08/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: github.com
Status: Not defined

CNA: VulDB
CVE: CVE-2026-124561 (🔒)

GCVE (CVE): GCVE-0-2026-124561
GCVE (VulDB): GCVE-100-432893
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 11/08/2026 15:52
Changes: 11/08/2026 15:52 (59)
Complete: 🔍
Submitter: ha ha-yang
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1035617: D-Link DIR-878 1.20B05 Stack-based Buffer Overflow (by ha ha-yang)

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