CVE-2026-123966

Tenda AC19 saveParentControlInfo heap-based overflow

CVSS score

10.0

EPSS probability

—

Risk score

1.0

Published

4 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Tenda AC19 saveParentControlInfo Heap-Based Buffer Overflow Vulnerability

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

A heap-based buffer overflow vulnerability affects Tenda AC19 version 16.03.10.07 within the saveParentControlInfo function. This remotely executable issue has a publicly disclosed exploit.

Why does it matter?

This critical vulnerability can be exploited remotely without authentication, posing a severe impact on target security.

What should be done?

Follow vendor advisories
Restrict device access

Chain of evidence and sources2 verified claims

Tenda AC19 16.03.10.07 sürümü saveParentControlInfo fonksiyonunda yığın tabanlı tampon taşmasından etkilenmektedir.

S0 · daybreach-canonical S1 · cvelist

Saldırı uzaktan gerçekleştirilebilir ve istismarı kamusal olarak açıklanmıştır.

S0 · daybreach-canonical S1 · cvelist

Show the technical text from the sources

A vulnerability was determined in Tenda AC19 16.03.10.07. Affected by this issue is the function saveParentControlInfo of the file /goform/saveParentControlInfo. This manipulation of the argument deviceId causes heap-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

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

CWE: CWE-122, CWE-119

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-123966 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	tenda	AC19	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
10.0	CVSS V2	—	AV:N/AC:L/Au:N/C:C/I:C/A:C	NVD
10.0	CVSS V31	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	NVD
10.0	CVSS V4_0	CRITICAL	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	CVE CNA
10.0	CVSS V3_1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C	CVE CNA
10.0	CVSS V3_0	CRITICAL	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C	CVE CNA
10.0	CVSS V2_0	—	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:C	CVE CNA
9.3	CVSS V40	CRITICAL	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	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-123966 is associated with the following CWEs:

CWE-122: Common Weakness Enumeration Entry CWE-122 CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-123966 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

VDB-432038 | Tenda AC19 saveParentControlInfo heap-based overflowvendor-advisory VDB-432038 | CTI Indicators (IOB, IOC, IOA)vendor-advisory CVE-2026-123966 | CVE Analysis and Reportvendor-advisory Submit #1035173 | Tenda AC19 V16.03.10.07 Heap-Based Buffer Overflow (CWE-122)vendor-advisory https://github.com/Tmzop/Tenda-AC19-saveParentControlInfo/blob/main/report.mdvendor-advisory https://www.tenda.com.cn/vendor-advisory

CVSS Vector Radar Chart

10.0 / 10

Vulnerability Scoring Details

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

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)High

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

tenda

Weakness Type (CWE & CAPEC)

CWE-122 CWE-119

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