CVE-2018-25318

Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change

Published Apr 29, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:h:tenda:fh303:5.07.68:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Tenda a300
Tenda a300 Firmware
Tenda fh303
Tenda fh303 Firmware
CPEs cpe:2.3:h:tenda:a300:-:*:*:*:*:*:*:*
cpe:2.3:h:tenda:fh303:-:*:*:*:*:*:*:*
cpe:2.3:o:tenda:a300_firmware:5.07.68_en:*:*:*:*:*:*:*
cpe:2.3:o:tenda:fh303_firmware:5.07.68_en:*:*:*:*:*:*:*
Vendors & Products Tenda a300
Tenda a300 Firmware
Tenda fh303
Tenda fh303 Firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Tenda
Tenda fh303/a300
Vendors & Products Tenda
Tenda fh303/a300
Type Values Removed Values Added
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.
Title Tenda FH303/A300 V5.07.68_EN Cookie Session Weakness DNS Change
Weaknesses CWE-290
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 9:44 PM
Reserved
Apr 29, 2026, 12:27 PM
Status
Analyzed
Published
Apr 29, 2026, 8:16 PM
Modified
Jun 17, 2026, 1:55 AM