CVE-2018-25316 | Tenda W308R v2 V5.07.48 contains a cookie session weakness v… | CVSS 9.8 CRITICAL

Description

Tenda W308R v2 V5.07.48 contains a cookie session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient session validation. Attackers can send GET requests to the goform/AdvSetDns endpoint with a crafted admin language cookie to change DNS servers and redirect user traffic to malicious sites.

Metadata

CVE ID: CVE-2018-25316
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-04-29 12:26 UTC
Published: 2026-04-29 19:24 UTC
Last updated: 2026-07-15 01:23 UTC
Primary CWE: CWE-290
CWE-290 Authentication Bypass by Spoofing
Vendor / Product: Tenda / W308R v2
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Tenda	W308R v2	—	5.07.48
Tenda	W308R v2	—	5.07.48

Weakness (CWE)

CWE	Source	Description
CWE-290	cna	CWE-290 Authentication Bypass by Spoofing

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

ExploitDB-44373 https://www.exploit-db.com/exploits/44373
VulnCheck Advisory: Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS Change https://www.vulncheck.com/advisories/tenda-w308r-v2-cookie-session-weakness-dns-change