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TI-2026-78650 Aliases CVE-2026-113744

Stack-based buffer overflow in Tenda AC19 web management service

Priority HIGH 82CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

Tenda AC19 httpd Web Management Service from 16.03.10.07 is affected. A stack-based buffer overflow in the formSetFirewallCfg function, when the firewallEn argument is manipulated (CWE-121), lets an attacker corrupt memory. A remote attacker can trigger it without authentication, and a public exploit has been disclosed.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00622 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaAC1916.03.10.07—No fix listedCNA
  • AC19 VendorTenda Affected 16.03.10.07 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:h:tenda:ac19:*:*:*:*:*:*:*:*——Tenda
  • cpe:2.3:h:tenda:ac19:*:*:*:*:*:*:*:* Versions — — ·Tenda

Remediation

The sources list no fixed version for Tenda AC19.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-113744
  2. 2026-10-28 CISA SSVC decision points changed
  3. 2026-10-28 Priority changed: MEDIUM → HIGH
  4. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Exploit 1

Other 1

  • TI-2021-11772 An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-08863 The goform/setUsbUnload endpoint of Tenda AC15 AC1900 version 15.03.05.19 allows remote… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10434 An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7)… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-66119 Tenda HG7/HG9/HG10 Boa Web Server formLoopBack boaGetVar stack-based overflow CVSS 4.0CRITICAL 10.0
  • TI-2026-57025 Tenda AC18 Telnet telnet missing authentication CVSS 4.0CRITICAL 10.0
  • TI-2026-57024 Tenda AC1206 Web UI ate R7WebsSecurityHandler missing authentication CVSS 4.0CRITICAL 10.0
See all 1963 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences