#VU27462 Permissions, Privileges, and Access Controls in TL-WA855RE - CVE-2020-10916

Vulnerability identifier: #VU27462

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-10916

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
TL-WA855RE
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: TP-Link

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists in "login.json" due to the lack of proper validation on first-time setup requests. A remote authenticated attacker on the local network can reset the password for the Admin account and execute arbitrary code in the context of the device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TL-WA855RE: before V4_200403

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External links
https://www.zerodayinitiative.com/advisories/ZDI-20-553/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.