CVE-2026-86781Network attack vector

Subscriber-level TLS private-key disclosure via unguarded download

Published Sep 11, 2026 · Updated Sep 11, 2026

Sensitive information exposure in Zen Plugins SSL Zen before 4.7.40 allows remote authenticated users to download site TLS materials. The early admin-request handler serves certificate, private-key, status, and debug-log files without checking a capability or security nonce. Any logged-in account, including a Subscriber, can copy TLS private keys, certificates, and diagnostic data reserved for administrators.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Sensitive information exposure in Zen Plugins SSL Zen before 4.7.40 allows remote authenticated users to download site TLS materials. The early admin-request handler serves certificate, private-key, status, and debug-log files without checking a capability or security nonce. Any logged-in account, including a Subscriber, can copy TLS private keys, certificates, and diagnostic data reserved for administrators.

The record

CVE
CVE-2026-86781
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
Zen Plugins
Product
SSL Zen
Classifications
T1552.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.7.40

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zen Plugins · SSL Zenversion=0 <4.7.40

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1552.004Unsecured Credentials: Private Keys

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo