Cisco IOS XR 4.0.1 through 4.2.0 for CRS-3 Carrier Routing System allows remote attackers…
Priority LOW 38CWE-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 4.0.1 through 4.2.0 for CRS-3 Carrier Routing System allows remote attackers to cause a denial of service (NPU ASIC scan and line-card reload) via crafted IPv6 extension headers, aka Bug ID CSCtx03546.
Why it matters now
EPSS 0.02178 82nd 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 · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xr_software:4.0.1:*:*:*:*:*:*:* | 4.0.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.0.2:*:*:*:*:*:*:* | 4.0.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.0.3:*:*:*:*:*:*:* | 4.0.3 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.0.4:*:*:*:*:*:*:* | 4.0.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.0.11:*:*:*:*:*:*:* | 4.0.11 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.1.0:*:*:*:*:*:*:* | 4.1.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.1.1:*:*:*:*:*:*:* | 4.1.1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.1.2:*:*:*:*:*:*:* | 4.1.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.1_base:*:*:*:*:*:*:* | 4.1_base | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr_software:4.2.0:*:*:*:*:*:*:* | 4.2.0 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xr_software:4.0.1:*:*:*:*:*:*:* Versions 4.0.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.0.2:*:*:*:*:*:*:* Versions 4.0.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.0.3:*:*:*:*:*:*:* Versions 4.0.3 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.0.4:*:*:*:*:*:*:* Versions 4.0.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.0.11:*:*:*:*:*:*:* Versions 4.0.11 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.1.0:*:*:*:*:*:*:* Versions 4.1.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.1.1:*:*:*:*:*:*:* Versions 4.1.1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.1.2:*:*:*:*:*:*:* Versions 4.1.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.1_base:*:*:*:*:*:*:* Versions 4.1_base Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr_software:4.2.0:*:*:*:*:*:*:* Versions 4.2.0 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-0769
- 2026-10-03 Alias added: GHSA-5qwc-hrc2-8ggm
References
Sources
- CVE-2015-0769 · CVE Program
- CVE-2015-0769 · NVD
- FIRST EPSS
- GHSA-5qwc-hrc2-8ggm · 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