CVE-2026-113744
CRITICAL 10A security vulnerability has been detected in Tenda AC19 16.03.10.07. The impacted element is the function formSetFirewallCfg of the file /goform/SetFirewallCfg of the component httpd Web Management Service. Such manipulation of the argument firewallEn leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed publicly and may be used.
Severe if exploited (CVSS 10), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.6%chance of exploitation in 30 days · 50th percentile
Impact if exploited
10CVSS 4.0 · CRITICAL
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-121: Stack-based Buffer Overflow
- CWE-119: Memory Corruption
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
References and research data (JSON)
All CVSS metrics
- CRITICAL 10 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P - CRITICAL 10 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 10 v3.0 · CNA Primary
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R - CRITICAL 10 v2.0 · CNA Primary
AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR - CRITICAL 9.3 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CRITICAL 10 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - HIGH 10 v2.0 · NVD Secondary
AV:N/AC:L/Au:N/C:C/I:C/A:C
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/henrythekingofuk/TendaCVE CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470
Advisories
- https://vuldb.com/cve/CVE-2026-113744 CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470 - https://vuldb.com/submit/1018542 CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-107031 EUVD · EUVD-2026-107031
Technical & other
- https://vuldb.com/vuln/422925 CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470 - https://vuldb.com/vuln/422925/cti CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470 - https://www.tenda.com.cn/ CVE record · VulDB · Updated 2026-10-21T01:30:24.075Z
NVD · CVE-2026-113744 · Updated 2026-10-21T14:26:26.470