TI-2019-09444 Aliases CVE-2019-12648 GHSA-hfqm-f33h-w94m

Cisco IOx for IOS Software Guest Operating System Unauthorized Access Vulnerability

MEDIUM 45CWE-284Published 2019-09-25 · Updated 2024-11-20

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

A vulnerability in the IOx application environment for Cisco IOS Software could allow an authenticated, remote attacker to gain unauthorized access to the Guest Operating System (Guest OS) running on an affected device. The vulnerability is due to incorrect role-based access control (RBAC) evaluation when a low-privileged user requests access to a Guest OS that should be restricted to administrative accounts. An attacker could exploit this vulnerability by authenticating to the Guest OS by using the low-privileged-user credentials. An exploit could allow the attacker to gain unauthorized access to the Guest OS as a root user.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0235 83rd 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: Total

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	Cisco IOS 15.7(3)M	all versions	—	No fix listed	CNA

Cisco IOS 15.7(3)M VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:ios:15.7\(3\)m3:::::::*	15.7(3)m3	Vulnerable	Cisco
cpe:2.3:h:cisco:807_industrial_integrated_services_routers:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:809_industrial_integrated_services_routers:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:829_industrial_integrated_services_routers:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:cgr_1120:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:cgr1240:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:ios:15.7\(3\)m3:*:*:*:*:*:*:* Versions 15.7(3)m3 Vulnerable ·Cisco
cpe:2.3:h:cisco:807_industrial_integrated_services_routers:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:809_industrial_integrated_services_routers:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:829_industrial_integrated_services_routers:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:cgr_1120:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:cgr1240:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-12648
2026-10-03 Alias added: GHSA-hfqm-f33h-w94m

References

Advisory 1

20190925 Cisco IOx for IOS Software Guest Operating System Unauthorized Access 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