Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-19811— TOTOLINK A800R firewall.so cstecgi.cgi setIpQosRules stack-based overflow

CVSS 8.8 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
TOTOLINKA800R4.1.2cu.5137_B20200730affected
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2026-19811

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
TOTOLINK A800R firewall.so cstecgi.cgi setIpQosRules stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in TOTOLINK A800R 4.1.2cu.5137_B20200730. The impacted element is the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component firewall.so. The manipulation of the argument Comment results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
TOTOLINKA800R 4.1.2cu.5137_B20200730 cpe:2.3:o:totolink:a800r_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19811

#POC DescriptionSource LinkShenlong Link
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 7216 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-19811

请登录查看更多情报信息。

Proof of Concept for CVE-2026-19811 (1)

Same Patch Batch · TOTOLINK · 2026-08-14 · 9 CVEs total

CVE-2026-198478.8 HIGHTOTOLINK A800R wps.so cstecgi.cgi setWiFiWpsConfig stack-based overflow
CVE-2026-198468.8 HIGHTOTOLINK A800R firewall.so cstecgi.cgi setUrlFilterRules stack-based overflow
CVE-2026-198458.8 HIGHTOTOLINK A800R lan.so cstecgi.cgi setStaticDhcpConfig stack-based overflow
CVE-2026-198448.8 HIGHTOTOLINK A800R ipv6.so cstecgi.cgi setRadvdCfg stack-based overflow
CVE-2026-198158.8 HIGHTOTOLINK A800R firewall.so cstecgi.cgi setParentalRules stack-based overflow
CVE-2026-198148.8 HIGHTOTOLINK A800R firewall.so cstecgi.cgi setMacQos stack-based overflow
CVE-2026-198138.8 HIGHTOTOLINK A800R firewall.so cstecgi.cgi setMacFilterRules stack-based overflow
CVE-2026-198128.8 HIGHTOTOLINK A800R product.so cstecgi.cgi UploadCustomModule stack-based overflow

IV. Related Vulnerabilities

Same product: A800R
Same vendor: TOTOLINK
Same weakness: CWE-121

V. Comments for CVE-2026-19811

No comments yet

Leave a comment