CVE-2015-4203
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000...
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.
Exploit likelihood
What each source reports
NVD Score used
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.
- Record
CVE-2015-4203- CVSS 2.0
- 5.4 Medium
AV:N/AC:H/Au:N/C:N/I:N/A:C - Weakness
- CWE-362
- Updated
- 2026-11-02
CVE List No score
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.
- Record
CVE-2015-4203- Updated
- 2026-11-02
EUVDEUVD-2015-4226 No score
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.
- Record
EUVD-2015-4226- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mfgx-5384-69g8 No score
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000...
Race condition in Cisco IOS 12.2SCH in the Performance Routing Engine (PRE) module on uBR10000 devices, when NetFlow and an MPLS IPv6 VPN are configured, allows remote attackers to cause a denial of service (PXF process crash) by sending malformed MPLS 6VPE packets quickly, aka Bug ID CSCud83396.
- Record
GHSA-mfgx-5384-69g8- Weakness
- CWE-362
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2015-4203 is a medium vulnerability (CVSS 5.4) in Cisco Ios, published June 23, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.21%, the 82nd percentile. No source names a fixed version.