7.5

CVE-2026-86300: Tenda AC9 Web Management R7WebsSecurityHandler improper authentication

Deferred
Published 07-09-2026Last modified 08-09-2026

Vulnerability summary

CVE-2026-86300 is a high (CVSS 7.5) Improper Authentication vulnerability in tenda ac9_firmware. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (CVE.org)
EPSS score
0.84%
0%100%
Low · +0.36 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Timeline

  1. 07-09-2026
    PublishedVulnerability first disclosed.
  2. 08-09-2026
    Last modifiedVulnerability information updated.

Description

A flaw has been found in Tenda AC9 15.03.05.14. This impacts the function R7WebsSecurityHandler of the component Web Management. This manipulation causes improper authentication. The attack may be initiated remotely. The exploit has been published and may be used.

CVSS metrics

7 scores · 2 sources · 4 versions

EPSS trend

Probability

0.84%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

Increase +0.36 pp

From 0.49% 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

1 found
  • githubUnverified

    Somevul

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Tenda1 product

1 vendor · 1 product

References

9 links