PT-2026-36293 · Lighttpd+1 · Lighttpd+1

Newym · Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-7546

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Totolink NR1800X version 9.1.0u.6279 B20210910

Description A stack-based buffer overflow exists in the lighttpd component. This issue occurs when the find host ip() function improperly handles the Host argument, allowing a remote attacker to execute the attack.

Recommendations Update Totolink NR1800X version 9.1.0u.6279 B20210910 to a patched version. As a temporary workaround, restrict access to the lighttpd component to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Stack Overflow

Weakness Enumeration

CWE-119

CWE-121

Related Identifiers

CVE-2026-7546

Affected Products

Nr1800X

Lighttpd

References · 8

• 🔥 https://github.com/newym/cve/blob/main/totolinknr1800x.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-7546 · Security Note
• https://vuldb.com/vuln/360357 · Note
• https://vuldb.com/submit/804404 · Note
• https://twitter.com/OrizonCyber/status/2050085351432114195 · Twitter Post
• https://totolink.net · Note
• https://twitter.com/VulmonFeeds/status/2050077180856545695 · Twitter Post
• https://vuldb.com/vuln/360357/cti · Note