Totolink NR1800X 9.1.0u.6279_B20210910 lighttpd find_host_ip Host stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Totolink NR1800X 9.1.0u.6279_B20210910. This affects the function find_host_ip of the component lighttpd. Performing a manipulation of the argument Host results in stack-based overflow. This vulnerability is reported as CVE-2026-7546. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability was found in Totolink NR1800X 9.1.0u.6279_B20210910. It has been classified as critical. This affects the function find_host_ip of the component lighttpd. The manipulation of the argument Host with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-7546. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

It is possible to mitigate the weakness by firewalling .

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26473). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.6

VulDB Base Score: 9.8
VulDB Temp Score: 8.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/30/2026 Advisory disclosed
04/30/2026 +0 days VulDB entry created
05/02/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2026-7546 (🔒)
GCVE (CVE): GCVE-0-2026-7546
GCVE (VulDB): GCVE-100-360357
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/30/2026 21:01
Updated: 05/02/2026 06:29
Changes: 04/30/2026 21:01 (57), 05/02/2026 06:29 (1)
Complete: 🔍
Submitter: NEWYM
Cache ID: 216::103

Submitinfo

Accepted

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