VulnSocial

CVE-2026-19811Disclosure

LOWCVSS 7.4 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Patch affected systems immediately
  • Hunt for exploitation attempts and persistence artifacts

Recommended action window: High priority (within 72h)

NVD 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.

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2.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-119CWE-121

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Exploit tooling references are present in monitored signal
  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Exploit tool or code specified in 1 signal
  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-08-14); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-08-14: 1Mentions · 2026-08-15: 1Exploit Tool / Code · 2026-08-15: 1Patch / Workaround · 2026-08-15: 1Technical Details · 2026-08-15: 108-1408-15
Signal classification2 categories
Disclosure
150.0%
Exploit
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-08-141
Disclosure1
2026-08-151
Exploit1
Full discourse2 posts
  • Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters
    Exploit

    CVE-2026-19811 - Critical stack buffer overflow in TOTOLINK A800R routers via setIpQosRules. Remote RCE possible, CVSS 8.8. Public exploit available, unpatched. Update firmware or isolate device now. #CVE #IoT #infosec https://www.valtersit.com/cve/CVE-2026-19811 #Security #Linux #DevOps #ValtersIT #snippet #devsecops #devops #developer #linux #git #github #gitlab #ubuntu #python #server #debian #sysadmin #angular #javascript #italy #spain #unitedkingdom #ireland #france #germany #poland #sweden #kali #centos #rhel #denmark #norway #finland

    Post summary

    CVE‑2026‑19811 is a stack buffer overflow in TOTOLINK A800R routers that allows remote code execution; a public exploit exists, the firmware is unpatched, so users should update or isolate the device.

    0000096
    1.0K followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-19811 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 t… https://www.cve.org/CVERecord?id=CVE-2026-19811

    Post summary

    The passage announces a newly discovered CVE-2026-19811 affecting the setIpQosRules function in /cgi-bin/cstecgi.cgi of TOTOLINK A800R, but provides no additional exploit, patch, or detailed technical information.

    00000974
    57.9K followersView on X

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