CVE-2000-0268
UnknownEPSS 1.66%
Last modified
CVE-2000-0268 is a vulnerability of currently unknown severity. Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.. EPSS estimates a 1.66% chance of exploitation in the next 30 days.
Description
Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios | 11.3aa |
| Cisco | Ios | 12.0\(2\) |
| Cisco | Ios | 12.0\(2\)xc |
| Cisco | Ios | 12.0\(2\)xd |
| Cisco | Ios | 12.0\(2\)xf |
| Cisco | Ios | 12.0\(2\)xg |
| Cisco | Ios | 12.0\(3\)t2 |
| Cisco | Ios | 12.0\(4\) |
| Cisco | Ios | 12.0\(4\)s |
| Cisco | Ios | 12.0\(4\)t |
| Cisco | Ios | 12.0\(5\) |
| Cisco | Ios | 12.0\(6\) |
| Cisco | Ios | 12.0\(7\)t |
| Cisco | Accesspath | ls-3 |
| Cisco | Accesspath | ts-3 |
| Cisco | Accesspath | vs-3 |
| Cisco | As5200 | All versions |
| Cisco | As5300 | All versions |
| Cisco | As5800 | All versions |
| Cisco | System Controller 3640 | All versions |
| Cisco | Voice Gateway As5800 | All versions |
| Cisco | 3660 Router | All versions |
| Cisco | 7100 Router | All versions |
| Cisco | 7200 Router | All versions |
| Cisco | 7500 Router | All versions |
| Cisco | Ubr7200 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2000-0268?
Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.
How severe is CVE-2000-0268?
Severity scoring for CVE-2000-0268 is pending analysis. The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.
How do I fix CVE-2000-0268?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2000-0268?
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Scan your code nowSource: NVD / NIST