---
id: CVE-2026-79896
title: >-
  Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom
  TLS ClientHello parser used by boks_portmux
summary: >-
  Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom
  TLS ClientHello parser used by boks_portmux. A remote unauthenticated attacker
  can submit a malformed ClientHello and terminate boks_portmux. Although the
  dae…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-125
vendor: Fortra
product: BoKS Manager
affected:
  - boks_manager >= 8.1.0.0 <= 8.1.0.23
  - boks_manager >= 9.0.0.0 <= 9.0.0.6
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T20:34:26.287'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79896'
references:
  - url: 'https://www.fortra.com/security/advisories/product-security/fi-2026-016'
    label: df4dee71-de3a-4139-9588-11b62fe6c0ff
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-01T16:02:42.850473Z'
ingestedAt: '2026-10-01T15:48:17.894Z'
epss: 0.00327
epssPercentile: 0.25679
---

## Overview

Fortra BoKS Manager contains an out-of-bounds read vulnerability in the custom TLS ClientHello parser used by boks_portmux. A remote unauthenticated attacker can submit a malformed ClientHello and terminate boks_portmux. Although the daemon is normally restarted automatically, repeated requests can sustain the service interruption.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.