CVE-2026-7546 Details
Description
A security vulnerability has been detected in Totolink NR1800X 9.1.0u.6279_B20210910. The impacted element is the function find_host_ip of the component lighttpd. Such manipulation of the argument Host leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.
A stack-based buffer overflow vulnerability has been identified in the Totolink NR1800X router, specifically in the lighttpd web server component, within the firmware version 9.1.0u.6279_B20210910. The vulnerability arises in the 'find_host_ip' function, where the absence of proper length validation allows for the exploitation of an overly long 'Host' header. This memory corruption can be triggered remotely, leading to a denial-of-service condition by causing the web service to crash.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 1, 2026CISA-ADP
Assessed May 1, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/newym/cve/blob/main/totolinknr1800x.md | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/804404 | [email protected] | Permission Required |
| https://vuldb.com/vuln/360357 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/360357/cti | [email protected] | AdvisoryPermission Required |
| https://www.totolink.net/ | [email protected] | Vendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| TOTOLINK NR1800X | 9.1.0u.6279_B20210910 |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 1, 2026 | New CVE Received | [email protected] |