Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending…
Priority LOW 26Published · 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
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.01657 76th 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 · 26
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:11.3aa:*:*:*:*:*:*:* | 11.3aa | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(2\):*:*:*:*:*:*:* | 12.0(2) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:* | 12.0(2)xc | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:* | 12.0(2)xd | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(2\)xf:*:*:*:*:*:*:* | 12.0(2)xf | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(2\)xg:*:*:*:*:*:*:* | 12.0(2)xg | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(3\)t2:*:*:*:*:*:*:* | 12.0(3)t2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(4\):*:*:*:*:*:*:* | 12.0(4) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(4\)s:*:*:*:*:*:*:* | 12.0(4)s | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(4\)t:*:*:*:*:*:*:* | 12.0(4)t | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:11.3aa:*:*:*:*:*:*:* Versions 11.3aa Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(2\):*:*:*:*:*:*:* Versions 12.0(2) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:* Versions 12.0(2)xc Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:* Versions 12.0(2)xd Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(2\)xf:*:*:*:*:*:*:* Versions 12.0(2)xf Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(2\)xg:*:*:*:*:*:*:* Versions 12.0(2)xg Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(3\)t2:*:*:*:*:*:*:* Versions 12.0(3)t2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(4\):*:*:*:*:*:*:* Versions 12.0(4) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(4\)s:*:*:*:*:*:*:* Versions 12.0(4)s Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(4\)t:*:*:*:*:*:*:* Versions 12.0(4)t Vulnerable ·Cisco
Show 16 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:12.0\(5\):*:*:*:*:*:*:* | 12.0(5) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(6\):*:*:*:*:*:*:* | 12.0(6) | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.0\(7\)t:*:*:*:*:*:*:* | 12.0(7)t | Vulnerable | Cisco |
| cpe:2.3:a:cisco:accesspath:ls-3:*:*:*:*:*:*:* | ls-3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:accesspath:ts-3:*:*:*:*:*:*:* | ts-3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:accesspath:vs-3:*:*:*:*:*:*:* | vs-3 | Vulnerable | Cisco |
| cpe:2.3:a:cisco:as5200:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:a:cisco:as5300:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:a:cisco:as5800:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:a:cisco:system_controller_3640:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:voice_gateway_as5800:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:3660_router:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:7100_router:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:7200_router:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:7500_router:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
| cpe:2.3:h:cisco:ubr7200:*:*:*:*:*:*:*:* | all versions | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:12.0\(5\):*:*:*:*:*:*:* Versions 12.0(5) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(6\):*:*:*:*:*:*:* Versions 12.0(6) Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.0\(7\)t:*:*:*:*:*:*:* Versions 12.0(7)t Vulnerable ·Cisco
- cpe:2.3:a:cisco:accesspath:ls-3:*:*:*:*:*:*:* Versions ls-3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:accesspath:ts-3:*:*:*:*:*:*:* Versions ts-3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:accesspath:vs-3:*:*:*:*:*:*:* Versions vs-3 Vulnerable ·Cisco
- cpe:2.3:a:cisco:as5200:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:a:cisco:as5300:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:a:cisco:as5800:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:a:cisco:system_controller_3640:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:voice_gateway_as5800:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:3660_router:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:7100_router:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:7200_router:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:7500_router:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
- cpe:2.3:h:cisco:ubr7200:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0268
- 2026-10-03 Alias added: GHSA-c43m-vj32-q46r
References
Sources
- CVE-2000-0268 · CVE Program
- CVE-2000-0268 · NVD
- FIRST EPSS
- GHSA-c43m-vj32-q46r · 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