Wavlink WL-WN579X3-C 231124 UPNP /cgi-bin/firewall.cgi sub_4019FC UpnpEnabled stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k1.56

Summaryinfo

A vulnerability classified as critical has been found in Wavlink WL-WN579X3-C 231124. Affected is the function sub_4019FC of the file /cgi-bin/firewall.cgi of the component UPNP Handler. The manipulation of the argument UpnpEnabled leads to stack-based overflow. This vulnerability is documented as CVE-2026-5004. The attack can be initiated remotely. Additionally, an exploit exists. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Wavlink WL-WN579X3-C 231124. This issue affects the function sub_4019FC of the file /cgi-bin/firewall.cgi of the component UPNP Handler. The manipulation of the argument UpnpEnabled with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-5004. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

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

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Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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

03/27/2026 Advisory disclosed
03/27/2026 +0 days VulDB entry created
03/27/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2026-5004 (🔒)
GCVE (CVE): GCVE-0-2026-5004
GCVE (VulDB): GCVE-100-353891
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/27/2026 14:56
Changes: 03/27/2026 14:56 (58)
Complete: 🔍
Submitter: LtzHuster2
Cache ID: 216:1C3:103

Submitinfo

Accepted

  • Submit #779149: Wavlink WL-WN579X3-C V231124 Stack-based Buffer Overflow (by LtzHuster2)

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