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CVE-2026-79896
Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability
High7.5EPSS 0.33%
- Published
- Updated
- Reserved
- Assigned by
- Fortra
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| FortraCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
- affected 8.1.0.0 – ≤ 8.1.0.23
- affected 9.0.0.0 – ≤ 9.0.0.6
What to do
Solution: Upgrade to boks-server 8.1.0.24 or boks-server 9.0.0.7.
Workaround: Until a fixed release is installed, restrict network access to boks_portmux listeners to trusted systems.
References (1)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-79896)Record last updated .