CVE-2026-4252

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

1.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

2026-03-16 16:32Z7 MO AGO

Last updated

2026-03-16 18:07Z7 MO AGO

Reserved

2026-03-16

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

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

Weaknesses

• CWE-287Improper AuthenticationClass
• CWE-291Reliance on IP Address for AuthenticationVariant

Data version

5.2

Document digest

18e37bc440bf597cc1b4bbe2a2563f23cbe05ffe80900154b7ead772bd2b86f9

• vuldb.comVDB-351210 | Tenda AC8 IPv6 check_is_ipv6 ip address for authenticationhttps://vuldb.com/?id.351210vdb-entrytechnical-description
• vuldb.comVDB-351210 | CTI Indicators (IOB, IOC, IOA)https://vuldb.com/?ctiid.351210signaturepermissions-required
• vuldb.comSubmit #771759 | Tenda AC8 V5 V16.03.50.11 Authentication Bypass Issueshttps://vuldb.com/?submit.771759third-party-advisory
• github.comhttps://github.com/digitalandrew/tenda_ac8_v5/blob/main/poc_ipv6_auth_bypass.pyexploit
• www.tenda.com.cnhttps://www.tenda.com.cn/product