TI-2015-03519 Aliases CVE-2015-4200 GHSA-5r6c-r963-4qqw

Memory leak in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance…

MEDIUM 40CWE-399Published 2015-06-23 · Updated 2024-08-06

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

Memory leak in the IPv6-to-IPv4 functionality in Cisco IOS 15.3S in the Performance Routing Engine (PRE) module on UBR devices allows remote attackers to cause a denial of service (memory consumption) by triggering an error during CPE negotiation, aka Bug ID CSCug00885.

Why it matters now

EPSS 0.03432 89th 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 · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:15.3\(3\)s:::::::*	15.3(3)s	Vulnerable	Cisco
cpe:2.3:o:cisco:ios:15.3s:::::::*	15.3s	Vulnerable	Cisco

cpe:2.3:o:cisco:ios:15.3\(3\)s:*:*:*:*:*:*:* Versions 15.3(3)s Vulnerable ·Cisco
cpe:2.3:o:cisco:ios:15.3s:*:*:*:*:*:*:* Versions 15.3s Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2015-4200
2026-10-03 Alias added: GHSA-5r6c-r963-4qqw

References

Advisory 1

20150622 Cisco IOS Software UBR Devices IPv6 to IPv4 Subsystem Denial of Service Vulnerability

TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8

See all 617 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences