CVE-2026-2140

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.73% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 51.8% of scored records. A rank, not a probability.

NVD base score

7.4 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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 analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-02-08 07:02Z6 MO AGO

Last updated

2026-02-23 09:39Z6 MO AGO

Reserved

2026-02-06

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

f931b70aefe247c09168e5d3df1e557efc3961f4582d8ca56cba048e1fdff017

• vuldb.comVDB-344775 | Tenda TX9 setMacFilterCfg sub_4223E0 buffer overflowhttps://vuldb.com/?id.344775vdb-entrytechnical-description
• vuldb.comVDB-344775 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.344775signaturepermissions-required
• vuldb.comSubmit #747251 | Tenda TX9 V22.03.02.10_multi Buffer Overflowhttps://vuldb.com/?submit.747251third-party-advisory
• vuldb.comSubmit #749747 | Tenda TX9 V22.03.02.18 Stack-based Buffer Overflow (Duplicate)https://vuldb.com/?submit.749747third-party-advisory
• github.comhttps://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.mdrelated
• github.comhttps://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md#pocexploit
• www.tenda.com.cnhttps://www.tenda.com.cn/product