TI-2018-00218 Aliases CVE-2018-0257 GHSA-pgx5-6r92-gp92

Resource management flaw in Cisco cBR Series Converged Broadband Routers

LOW 21CWE-399Published 2018-04-19 · Updated 2024-11-29

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA.

Summary

A vulnerability in Cisco IOS XE Software running on Cisco cBR Series Converged Broadband Routers could allow an unauthenticated, adjacent attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to the incorrect handling of certain DHCP packets. An attacker could exploit this vulnerability by sending certain DHCP packets to a specific segment of an affected device. A successful exploit could allow the attacker to increase CPU usage on the affected device and cause a DoS condition. Cisco Bug IDs: CSCvg73687.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00773 55th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Cisco cBR Series Converged Broadband Routers	Cisco cBR Series Converged Broadband Routers	—	No fix listed	CNA

Cisco cBR Series Converged Broadband Routers Vendor— Affected Cisco cBR Series Converged Broadband Routers Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios_xe::::::::	3.18 – 3.18.4; 16.6 – 16.6.3; after 16.7, up to 16.7.2	Vulnerable	Cisco
cpe:2.3:o:cisco:ios_xe:15.6\(2\)sp:::::::*	15.6(2)sp	Vulnerable	Cisco
cpe:2.3:o:cisco:ios_xe:16.4:::::::*	16.4	Vulnerable	Cisco
cpe:2.3:o:cisco:ios_xe:16.5:::::::*	16.5	Vulnerable	Cisco

cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:* Versions 3.18 – 3.18.4; 16.6 – 16.6.3; after 16.7, up to 16.7.2 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios_xe:15.6\(2\)sp:*:*:*:*:*:*:* Versions 15.6(2)sp Vulnerable ·Cisco
cpe:2.3:o:cisco:ios_xe:16.4:*:*:*:*:*:*:* Versions 16.4 Vulnerable ·Cisco
cpe:2.3:o:cisco:ios_xe:16.5:*:*:*:*:*:*:* Versions 16.5 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0257
2026-10-03 Alias added: GHSA-pgx5-6r92-gp92

References

Advisory 1

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180418-cbr8

TI-2023-06904 Cisco is providing an update for the ongoing investigation into observed exploitation of… KEVCVSS 3.1CRITICAL 10.0
TI-2018-00122 Memory corruption 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-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
TI-2017-04497 Memory corruption in Cisco IOS XE Software KEVCVSS 3.1HIGH 8.8

See all 561 →

Sources

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