CVE-2025-6916: totolink t6_firmware Improper Authentication
Vulnerability summary
CVE-2025-6916 is a high (CVSS 8.8) Improper Authentication vulnerability in totolink t6_firmware. EPSS estimates a 0.89% chance of exploitation in the next 30 days, higher than 58.8% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 30-06-2025PublishedVulnerability first disclosed.
- 30-06-2025Last modifiedVulnerability information updated.
Description
A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015. This affects the function Form_Login of the file /formLoginAuth.htm. The manipulation of the argument authCode/goURL leads to missing authentication. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used.
CVSS metrics
7 scores · 2 sources · 4 versions- NVDNIST7.4HighCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XDiffers
- NVDNIST8.8HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST8.3HighAV:A/AC:L/Au:N/C:C/I:C/A:C
EPSS trend
Probability
0.89%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
+0.03 pp
From 0.86% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundIot Vuln
Maturity: poc
Weaknesses
CWE · root cause- CWE-287Improper AuthenticationWhen an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
- CWE-306Missing Authentication for Critical FunctionThe product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Affected systems
Totolink1 product
- t6_firmware4.1.5cu.748_B20211015 | v4.1.5cu.748_b20211015
1 vendor · 1 product
References
5 links- www.totolink.netProduct