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TI-2026-55270 Aliases CVE-2026-79896GHSA-h5vq-j79p-4xf3

Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability

Priority LOW 39CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

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 daemon is normally restarted automatically, repeated requests can sustain the service interruption.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00327 25th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FortraBoKS Manager8.1.0.0 – 8.1.0.23; 9.0.0.0 – 9.0.0.6—No fix listedCNA
  • BoKS Manager VendorFortra Affected 8.1.0.0 – 8.1.0.23; 9.0.0.0 – 9.0.0.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79896
  2. 2026-10-03 Alias added: GHSA-h5vq-j79p-4xf3

References

Other 1

  • TI-2025-09211 Deserialization Vulnerability in GoAnywhere MFT's License Servlet KEVCVSS 3.1CRITICAL 10.0
  • TI-2022-20934 Cobalt Strike 4.7.1 fails to properly escape HTML tags when they are displayed on Swing… KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-00185 Authentication Bypass in GoAnywhere MFT CVSS 3.1CRITICAL 9.8
  • TI-2024-04900 SQL Injection Vulnerability in FileCatalyst Workflow 5.1.6 Build 135 (and earlier) CVSS 3.1CRITICAL 9.8
  • TI-2023-00634 Fortra GoAnywhere MFT License Response Servlet Command Injection KEVCVSS 3.1HIGH 7.2
  • TI-2022-18577 An XSS (Cross Site Scripting) vulnerability was found in HelpSystems Cobalt Strike… KEVCVSS 3.1MEDIUM 6.1
See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences