Livingston Portmaster routers running ComOS use the same initial sequence number (ISN)…
Priority LOW 36Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Livingston Portmaster routers running ComOS use the same initial sequence number (ISN) for TCP connections, which allows remote attackers to conduct spoofing and hijack TCP sessions.
Why it matters now
EPSS 0.01351 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:livingston_portmaster:portmaster:initial:*:*:*:*:*:*:* | initial | Vulnerable | Livingston Portmaster |
- cpe:2.3:h:livingston_portmaster:portmaster:initial:*:*:*:*:*:*:* Versions initial Vulnerable ·Livingston Portmaster
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-1999-1150
- 2026-10-03 Alias added: GHSA-vxxg-9388-x757
References
—
More Livingston Portmaster Portmaster vulnerabilities
- TI-1999-00215 Livingston portmaster machines could be rebooted via a series of commands. CVSS 2.0MEDIUM 5.0
Sources
- CVE-1999-1150 · CVE Program
- CVE-1999-1150 · NVD
- FIRST EPSS
- GHSA-vxxg-9388-x757 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences