CVE-2018-25316 — Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS Change

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CRITICAL

Tenda W308R v2 V5.07.48 Cookie Session Weakness DNS Change

Published Apr 29, 2026

9.3

CRITICAL

CVSS 4.0

EPSS 0.65%

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.

Affected products

Vendor Tenda Product n/a Default
unaffected
- Version
  5.07.48
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Tenda

n/a

unaffected

Version	Status	Constraints
5.07.48	affected	-

Remediation

No remediation recorded yet.

Metrics

0.65% 0.00651

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00651

Score over time

Apr–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.65% (0.00651)	49.30th	v5 (v2026.06.15)
Jun 15, 2026	0.65% (0.00651)	46.14th	v5 (v2026.06.15)
Apr 30, 2026	0.04% (0.00043)	13.15th	v4 (v2025.03.14)

Weaknesses (1)

CWE-290

Authentication Bypass by Spoofing

References (2)

https://www.exploit-db.com/exploits/44373
exploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/tenda-w308r-v2-cookie-session-weakness-dns-change
third-party-advisoryThird Party Advisory

Link	Providers	Tags
https://www.exploit-db.com/exploits/44373		exploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/tenda-w308r-v2-cookie-session-weakness-dns-change		third-party-advisoryThird Party Advisory