CVE-2001-0288 EXPLOIT
7.5
HIGH · CVSS 2.0 · EPSS 5.4% (pctl 92)
Patch early
A public exploit exists.
Description
Cisco switches and routers running IOS 12.1 and earlier produce predictable TCP Initial Sequence Numbers (ISNs), which allows remote attackers to spoof or hijack TCP connections.
Scoring
| CVSS | 7.5 (HIGH, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| EPSS | 5.41% — more likely to be exploited than 92% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2001-05-03 |
| Last modified | 2026-06-16 |
Affected (1)
| Vendor | Product |
|---|---|
| cisco | ios |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Linux Kernel 2.2 - Predictable TCP Initial Sequence Number | 1999-09-27 |
References
→ the Explorer · watch your stack · NVD