CVE-2023-36340
CWE-787Published: October 16, 2023· Updated: Jun 17, 2026
Official Description
TOTOLINK NR1800X V9.1.0u.6279_B20210910 was discovered to contain a stack overflow via the http_host parameter in the function loginAuth.
Risk Analysis
A stack overflow exists in the TOTOLINK NR1800X login authentication process due to improper validation of the http_host parameter. The 9.8 CVSS score reflects the ability for an unauthenticated remote attacker to achieve full system impact.
No public exploit is known for this flaw, and it is not in the KEV database. The vulnerability is remotely exploitable with low complexity.
Apply the latest firmware updates released by TOTOLINK for the NR1800X device.
Technical Analysis
CVE-2023-36340 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (2)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-36340 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts