CVE-2026-4543 | Wavlink WL-WN578W2 221110 POST Request /cgi-bin/firewall.cgi dmz_flag/del_flag command injection

VDB-352360 · CVE-2026-4543 · GCVE-100-352360 WAVLINK WL-WN578W2 221110 POST REQUEST /CGI-BIN/FIREWALL.CGI DMZ_FLAG/DEL_FLAG COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.7 $0-$5k 1.78+ 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. Productinfo Vendor Wavlink Name WL-WN578W2 Version 221110 License commercial 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock 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 03/21/2026 +0 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 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/21/2026 16:28 Changes: 03/21/2026 16:28 (57) Complete: 🔍 Submitter: LtzHuster Cache ID: 99:55E:101 Submitinfo Accepted Submit #774690: Wavlink WL-WN578W2 V221110 Command Injection (by LtzHuster) Duplicate Submit #XXXXXX: Xxxxxxx Xx-xxxxxxx Xxxxxxx Xxxxxxx Xxxxxxxxx (by LtzHuster) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸