CVE-2026-6094Network attack vector

Process interruption via unchecked encrypted-content length

Published Jun 25, 2026 · Updated Jun 25, 2026

Out-of-bounds read in wolfSSL 5.8.0 through 5.9.1 allows remote attackers to interrupt a process via crafted PKCS7 EnvelopedData. wc_PKCS7_DecodeEnvelopedData advances through pkiMsg using the encrypted-content length without verifying that the offset plus length remains within pkiMsgSz. Reachability requires an application to pass attacker-controlled S/MIME or CMS content to the decoder; no memory write is reported.

CVSS severity6.3
Medium
EPSS probability0.52%
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

Out-of-bounds read in wolfSSL 5.8.0 through 5.9.1 allows remote attackers to interrupt a process via crafted PKCS7 EnvelopedData. wc_PKCS7_DecodeEnvelopedData advances through pkiMsg using the encrypted-content length without verifying that the offset plus length remains within pkiMsgSz. Reachability requires an application to pass attacker-controlled S/MIME or CMS content to the decoder; no memory write is reported.

The record

CVE
CVE-2026-6094
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
wolfSSL
Product
wolfSSL
Classifications
CWE-125, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=5.8.0 <=5.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

wolfSSL · wolfSSLversion=5.8.0 <=5.9.1

Published CVSS scores

6.3wolfSSLCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

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