Vulnerability · Published Oct 1, 2026 · Assigned by Fortra
CVE-2026-79896Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability
High 7.5
In plain English
A high-severity out-of-bounds read in BoKS Manager from Fortra. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 74.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortra | BoKS Manager | 8.1.0.0 – through 8.1.0.239.0.0.0 – through 9.0.0.6 |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H