9.8

CVE-2018-25318: tenda a300_firmware Authentication Bypass by Spoofing

CVSS: 9.8v3.1CriticalAnalyzed
Published 29-04-2026Last modified 01-10-2026
Open JSON

Vulnerability summary

CVE-2018-25318 is a critical (CVSS 9.8) Authentication Bypass by Spoofing vulnerability in tenda a300_firmware. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.65%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Timeline

  1. 29-04-2026
    PublishedVulnerability first disclosed.
  2. 01-10-2026
    Last modifiedVulnerability information updated.

Description

Tenda FH303/A300 firmware V5.07.68_EN contains a session weakness vulnerability that allows unauthenticated attackers to modify DNS settings by exploiting insufficient cookie validation. Attackers can send GET requests to the /goform/AdvSetDns endpoint with a crafted admin cookie to change DNS servers and redirect user traffic to malicious sites.

CVSS metrics

4 scores · 2 sources · 2 versions

EPSS trend

Probability

0.65%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

0.00 pp

From 0.65% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.65%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databaseaspUnverified

    Tenda FH303/A300 Firmware v5.07.68_EN - Remote DNS Change

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Tenda3 products

1 vendor · 3 products

References

2 links