Cisco IOS XR 4.2.0, 4.3.0, 5.0.0, 5.1.0, 5.2.0, 5.2.2, 5.2.4, 5.3.0, and 5.3.2 does not…
Priority LOW 36CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Cisco IOS XR 4.2.0, 4.3.0, 5.0.0, 5.1.0, 5.2.0, 5.2.2, 5.2.4, 5.3.0, and 5.3.2 does not properly restrict the number of Path Computation Elements (PCEs) for OSPF LSA opaque area updates, which allows remote attackers to cause a denial of service (device reload) via a crafted update, aka Bug ID CSCuw83486.
Why it matters now
EPSS 0.01765 78th 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 · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios_xr:4.2.0:*:*:*:*:*:*:* | 4.2.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:* | 4.3.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.0.0:*:*:*:*:*:*:* | 5.0.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:* | 5.1.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.2.0:*:*:*:*:*:*:* | 5.2.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:* | 5.2.2 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.2.4:*:*:*:*:*:*:* | 5.2.4 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.3.0:*:*:*:*:*:*:* | 5.3.0 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios_xr:5.3.2:*:*:*:*:*:*:* | 5.3.2 | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios_xr:4.2.0:*:*:*:*:*:*:* Versions 4.2.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:4.3.0:*:*:*:*:*:*:* Versions 4.3.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.0.0:*:*:*:*:*:*:* Versions 5.0.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.1.0:*:*:*:*:*:*:* Versions 5.1.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.2.0:*:*:*:*:*:*:* Versions 5.2.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.2.2:*:*:*:*:*:*:* Versions 5.2.2 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.2.4:*:*:*:*:*:*:* Versions 5.2.4 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.3.0:*:*:*:*:*:*:* Versions 5.3.0 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios_xr:5.3.2:*:*:*:*:*:*:* Versions 5.3.2 Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2015-6432
- 2026-10-03 Alias added: GHSA-cxmr-8vfq-vhfr
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-2015-6432 · CVE Program
- CVE-2015-6432 · NVD
- FIRST EPSS
- GHSA-cxmr-8vfq-vhfr · 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