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CVE-2026-4252: Tenda AC8 IPv6 check_is_ipv6 ip address for authentication

Analyzed
Published 16-03-2026Last modified 16-03-2026

Vulnerability summary

CVE-2026-4252 is a high (CVSS 10.0) Improper Authentication vulnerability in tenda ac8_firmware. EPSS estimates a 2.06% chance of exploitation in the next 30 days, higher than 81.1% of scored vulnerabilities. 2 public exploits are recorded.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (CVE.org)
EPSS score
2.06%
0%100%
Low · +0.80 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2github, reference

Timeline

  1. 16-03-2026
    PublishedVulnerability first disclosed.
  2. 16-03-2026
    Last modifiedVulnerability information updated.

Description

A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

CVSS metrics

7 scores · 2 sources · 4 versions

EPSS trend

Probability

2.06%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

Increase +0.80 pp

From 1.26% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • githubUnverified

    Tenda Ac8 V5

    Maturity: poc

  • referenceUnverified

    Exploit Reference (vuldb.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Tenda1 product

1 vendor · 1 product

References

5 links