CVE-2026-3622 | TP-Link TL-WR841N -/0.9.1 UPnP out-of-bounds

VDB-353772 · CVE-2026-3622 · GCVE-0-2026-3622 TP-LINK TL-WR841N -/0.9.1 UPNP OUT-OF-BOUNDS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.8 $0-$5k 2.02+ Summaryinfo A vulnerability was found in TP-Link TL-WR841N. It has been declared as problematic. Affected by this issue is some unknown functionality of the component UPnP. The manipulation results in out-of-bounds. This vulnerability is reported as CVE-2026-3622. The attacker must have access to the local network to execute the attack. No exploit exists. It is recommended to upgrade the affected component. Detailsinfo A vulnerability classified as critical has been found in TP-Link TL-WR841N. Affected is some unknown processing of the component UPnP. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, and availability. CVE summarizes: The vulnerability exists in the UPnP component of TL-WR841N v14, where improper input validation leads to an out-of-bounds read, potentially causing a crash of the UPnP service. Successful exploitation can cause the UPnP service to crash, resulting in a Denial-of-Service condition.  This vulnerability affects TL-WR841N v14 < EN_0.9.1 4.19 Build 260303 Rel.42399n (V14_260303) and < US_0.9.1.4.19 Build 260312 Rel. 49108n (V14_0304). The weakness was disclosed by Md Sharafatullah Zomadder and Rahamatullah Khondoker. The advisory is shared for download at tp-link.com. This vulnerability is traded as CVE-2026-3622 since 03/06/2026. The exploitability is told to be easy. Access to the local network is required for this attack to succeed. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. Upgrading to version 0.9.1 4.19 eliminates this vulnerability. Productinfo Type Router Operating System Vendor TP-Link Name TL-WR841N Version - 0.9.1 License commercial Website Vendor: https://www.tp-link.com/ CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 7.1 VulDB Meta Temp Score: 6.8 VulDB Base Score: 7.1 VulDB Temp Score: 6.8 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: Out-of-bounds CWE: CWE-125 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined 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: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: TL-WR841N 0.9.1 4.19 Timelineinfo 03/06/2026 CVE reserved 03/26/2026 +20 days Advisory disclosed 03/26/2026 +0 days VulDB entry created 03/26/2026 +0 days VulDB entry last update Sourcesinfo Vendor: tp-link.com Advisory: tp-link.com Researcher: Md Sharafatullah Zomadder, Rahamatullah Khondoker Status: Confirmed CVE: CVE-2026-3622 (🔒) GCVE (CVE): GCVE-0-2026-3622 GCVE (VulDB): GCVE-100-353772 Entryinfo Created: 03/26/2026 23:17 Changes: 03/26/2026 23:17 (69) Complete: 🔍 Cache ID: 99:531:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸