TI-2019-12061 Aliases CVE-2019-16026 GHSA-fhjc-mpvv-5r8g

Cisco Mobility Management Entity Denial of Service Vulnerability

LOW 29CWE-20Published 2020-01-26 · Updated 2024-11-15

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability in the implementation of the Stream Control Transmission Protocol (SCTP) on Cisco Mobility Management Entity (MME) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an eNodeB that is connected to an affected device. The vulnerability is due to insufficient input validation of SCTP traffic. An attacker could exploit this vulnerability by leveraging a man-in-the-middle position between the eNodeB and the MME and then sending a crafted SCTP message to the MME. A successful exploit would cause the MME to stop sending SCTP messages to the eNodeB, triggering a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01389 72nd 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	Cisco ASR 5000 Series Software	all versions	—	No fix listed	CNA

Cisco ASR 5000 Series Software VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:staros::::::::	before 21.16.1	Vulnerable	Cisco
cpe:2.3:h:cisco:asr_5000:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_5500:-:::::::*	not specified by NVD	Running on	Cisco
cpe:2.3:h:cisco:asr_5700:-:::::::*	not specified by NVD	Running on	Cisco

cpe:2.3:o:cisco:staros:*:*:*:*:*:*:*:* Versions before 21.16.1 Vulnerable ·Cisco
cpe:2.3:h:cisco:asr_5000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_5500:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco
cpe:2.3:h:cisco:asr_5700:-:*:*:*:*:*:*:* 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-2019-16026
2026-10-03 Alias added: GHSA-fhjc-mpvv-5r8g

References

Advisory 1

20200108 Cisco Mobility Management Entity Denial of Service Vulnerability

TI-2025-23504 Erlang/OTP SSH Vulnerable to Pre-Authentication RCE KEVCVSS 3.1CRITICAL 10.0
TI-2019-01491 Cisco StarOS Denial of Service Vulnerability CVSS 3.0HIGH 8.6
TI-2018-00328 Improper input validation in Cisco StarOS unknown CVSS 3.0HIGH 8.6
TI-2021-01080 Cisco StarOS IPv4 Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2018-00201 Improper input validation in Cisco StarOS CVSS 3.1HIGH 7.5
TI-2021-01105 Cisco StarOS Denial of Service Vulnerability CVSS 3.1HIGH 7.5

See all 24 →

Sources

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