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    CVE-2022-43636

    This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link TL-WR940N 6_211111 3.20.1(US) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of sufficient randomness in the sequnce numbers used for session managment. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-18334.

    Published:Mar 29, 2023
    Last Modified:Feb 12, 2025
    EPS:Mar 29, 2023
    EPSS Score:0.00029
    CVSS Score:8.8

    Affected Products

    Vendor
    Tp-link
    Product
    Tl-wr940n
    Vendor
    Tp-link
    Product
    Tl-wr940n Firmware

    Exploits

    No exploit reference

    Related CVEs

    CVE-2025-14739 (CVSS 6.8) — Access of Uninitialized Pointer vulnerability in TP-Link WR940N and WR941ND allows local unauthenticated attac…
    CVE-2025-11676 (CVSS 7.1) — Improper input validation vulnerability in TP-Link System Inc. TL-WR940N V6 (UPnP modules), which allows unaut…
    CVE-2025-6151 (CVSS 8.2) — A vulnerability has been found in TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unkn…
    CVE-2024-54887 (CVSS 8) — TP-Link TL-WR940N V3 and V4 with firmware 3.16.9 and earlier contain a buffer overflow via the dnsserver1 and …
    CVE-2023-50224 (CVSS 6.5) — TP-Link TL-WR841N dropbearpwd Improper Authentication Information Disclosure Vulnerability. This vulnerability…
    CVE-2023-39747 (CVSS 9.8) — TP-Link WR841N V8, TP-Link TL-WR940N V2, and TL-WR941ND V5 were discovered to contain a buffer overflow via th…
    CVE-2023-36356 (CVSS 7.7) — TP-Link TL-WR940N V2/V4/V6, TL-WR841N V8, TL-WR941ND V5, and TL-WR740N V1/V2 were discovered to contain a buff…
    CVE-2023-36359 (CVSS 7.5) — TP-Link TL-WR940N V4, TL-WR841N V8/V10, TL-WR940N V2/V3 and TL-WR941ND V5/V6 were discovered to contain a buff…
    CVE-2023-36354 (CVSS 7.5) — TP-Link TL-WR940N V4, TL-WR841N V8/V10, TL-WR740N V1/V2, TL-WR940N V2/V3, and TL-WR941ND V5/V6 were discovered…
    CVE-2023-36358 (CVSS 7.7) — TP-Link TL-WR940N V2/V3/V4, TL-WR941ND V5/V6, TL-WR743ND V1 and TL-WR841N V8 were discovered to contain a buff…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High