Cisco IOS XR 3.6.x, 3.8.x before 3.8.3, and 3.9.x before 3.9.1 does not properly remove…
Priority LOW 36CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Cisco IOS XR 3.6.x, 3.8.x before 3.8.3, and 3.9.x before 3.9.1 does not properly remove sshd_lock files from /tmp/, which allows remote attackers to cause a denial of service (disk consumption) by making many SSHv1 connections, aka Bug ID CSCtd64417.
Why it matters now
EPSS 0.01205 68th 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 · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:* | 3.6.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:* | 3.6.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:* | 3.6.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:* | 3.6.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:* | 3.8.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:* | 3.8.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:* | 3.8.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:* | 3.9.0 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xr:3.6.0:*:*:*:*:*:*:* Versions 3.6.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.6.1:*:*:*:*:*:*:* Versions 3.6.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.6.2:*:*:*:*:*:*:* Versions 3.6.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.6.3:*:*:*:*:*:*:* Versions 3.6.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.8.0:*:*:*:*:*:*:* Versions 3.8.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.8.1:*:*:*:*:*:*:* Versions 3.8.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.8.2:*:*:*:*:*:*:* Versions 3.8.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:3.9.0:*:*:*:*:*:*:* Versions 3.9.0 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2011-0949
- 2026-10-03 Alias added: GHSA-2j4h-p58q-g7mp
References
More Cisco Ios Xr vulnerabilities
- TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
- TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
- TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
Sources
- CVE-2011-0949 · CVE Program
- CVE-2011-0949 · NVD
- FIRST EPSS
- GHSA-2j4h-p58q-g7mp · 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