CVE-2026-79896— Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability
Quick assessment
Affected
Fortra BoKS Manager
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Fortra BoKS Manager 中用于 boks_portmux 的自定义 TLS ClientHello 解析器存在越界读取漏洞。远程未认证攻击者可以提交格式错误的 ClientHello 消息，导致 boks_portmux 进程终止。尽管该守护进程通常会自动重启，但持续发送此类请求可造成服务中断的延续。
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I. Basic Information for CVE-2026-79896
Vulnerability Information
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Vulnerability Title
Fortra BoKS Manager boks_portmux TLS ClientHello out-of-bounds read vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Fortra | BoKS Manager | 8.1.0.0 ~ 8.1.0.23 | - |
|
II. Public POCs for CVE-2026-79896
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-79896 (1)
Same Patch Batch · Fortra · 2026-10-01 · 8 CVEs total
| CVE-2026-79901 | 9.9 CRITICAL | Predictable Active Directory service-account passwords in BoKS Manager |
| CVE-2026-12627 | 9.8 CRITICAL | Fortra's Core Privileged Access Manager (BoKS) autoregistration stack buffer overflow vuln |
| CVE-2026-79898 | 9.1 CRITICAL | Fortra BoKS Manager crlserver command injection vulnerability |
| CVE-2026-14316 | 8.1 HIGH | Heap buffer overflow in boks_sshd revoked-key error handling |
| CVE-2026-79899 | 7.9 HIGH | Fortra BoKS Manager bccgethostcert insecure temporary file vulnerability |
| CVE-2026-79900 | 6.5 MEDIUM | Heap overflow in KSL checksum initialization |
| CVE-2026-9864 | 4.8 MEDIUM | Fortra BoKS Server Agent adjoin machine-account password generation vulnerability |
IV. Related Vulnerabilities
Same vendor: Fortra
-
CVE-2026-14316
Heap buffer overflow in boks_sshd revoked-key error handling -
CVE-2026-9864
Fortra BoKS Server Agent adjoin machine-account password gen -
CVE-2026-12627
Fortra's Core Privileged Access Manager (BoKS) autoregistrat -
CVE-2026-79898
Fortra BoKS Manager crlserver command injection vulnerabilit -
CVE-2026-79899
Fortra BoKS Manager bccgethostcert insecure temporary file v
Same weakness: CWE-125
V. Comments for CVE-2026-79896
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