Wavlink WL-WN578W2 221110 POST Request /cgi-bin/firewall.cgi dmz_flag/del_flag command injection

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Wavlink WL-WN578W2 221110. This affects an unknown function of the file /cgi-bin/firewall.cgi of the component POST Request Handler. Executing a manipulation of the argument dmz_flag/del_flag can lead to command injection. This vulnerability is registered as CVE-2026-4543. It is possible to launch the attack remotely. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability classified as critical was found in Wavlink WL-WN578W2 221110. This vulnerability affects an unknown functionality of the file /cgi-bin/firewall.cgi of the component POST Request Handler. The manipulation of the argument dmz_flag/del_flag with an unknown input leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-4543. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

It is possible to download the exploit 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.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14295). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

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

03/21/2026 Advisory disclosed
03/21/2026 +0 days VulDB entry created
03/22/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2026-4543 (🔒)
GCVE (CVE): GCVE-0-2026-4543
GCVE (VulDB): GCVE-100-352360
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/21/2026 16:28
Updated: 03/22/2026 11:28
Changes: 03/21/2026 16:28 (57), 03/22/2026 11:28 (1)
Complete: 🔍
Submitter: LtzHuster
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #774690: Wavlink WL-WN578W2 V221110 Command Injection (by LtzHuster)

Duplicate

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