CVE-2022-43636
TP-Link · published 2023-03-29
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Zero Day Initiative via the CVE Program.
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.
Filed by Zero Day Initiative; not a statement by TP-Link.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| TP-Link | TL-WR940N | 6_211111 3.20.1(US): affected |
Products named in NVD's CPE match criteria (1)
cpe:2.3:o:tp-link:tl-wr940n_firmware:6_211111_3.20.1:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 8.8 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.0: 7.5 HIGH — as published by Zero Day Initiative (Secondary)
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.zerodayinitiative.com/advisories/ZDI-22-1614/
- https://www.zerodayinitiative.com/advisories/ZDI-22-1614/
Source dates: published 2023-03-29, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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