TI-2021-01336 Aliases CVE-2021-1614 GHSA-8m79-xg2c-ggjm

Cisco SD-WAN Software Information Disclosure Vulnerability

LOW 32CWE-126Published 2021-07-22 · Updated 2024-11-07

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-126 and the CVSS impact.

Summary

A vulnerability in the Multiprotocol Label Switching (MPLS) packet handling function of Cisco SD-WAN Software could allow an unauthenticated, remote attacker to gain access to information stored in MPLS buffer memory. This vulnerability is due to insufficient handling of malformed MPLS packets that are processed by a device that is running Cisco SD-WAN Software. An attacker could exploit this vulnerability by sending a crafted MPLS packet to an affected device that is running Cisco SD-WAN Software or Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to gain unauthorized access to sensitive information.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01188 68th 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: Yes
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 SD-WAN Solution	all versions	—	No fix listed	CNA

Cisco SD-WAN Solution VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:sd-wan::::::::	18.4.0 to before 18.4.6; 19.2.0 to before 19.2.3; 20.3 to before 20.3.2; 20.4 to before 20.4.1; 20.5 to before 20.5.1	Vulnerable	Cisco

cpe:2.3:a:cisco:sd-wan:*:*:*:*:*:*:*:* Versions 18.4.0 to before 18.4.6; 19.2.0 to before 19.2.3; 20.3 to before 20.3.2; 20.4 to before 20.4.1; 20.5 to before 20.5.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1614
2026-10-03 Alias added: GHSA-8m79-xg2c-ggjm

References

Patch 1

20210721 Cisco SD-WAN Software Information Disclosure Vulnerability

TI-2022-05334 Cisco SD-WAN Software Privilege Escalation Vulnerability KEVCVSS 3.1HIGH 7.8
TI-2022-05377 Cisco SD-WAN Software Privilege Escalation Vulnerabilities CVSS 3.1HIGH 7.8
TI-2020-16490 Cisco SD-WAN vManage Software Arbitrary File Creation Vulnerability CVSS 3.1MEDIUM 6.5
TI-2020-02926 Cisco SD-WAN Solution Software Buffer Overflow Vulnerability CVSS 3.1CRITICAL 9.8
TI-2018-10947 Cisco SD-WAN Solution Certificate Validation Bypass Vulnerability CVSS 3.1CRITICAL 9.8
TI-2020-02925 Cisco SD-WAN vManage Software Authorization Bypass Vulnerability CVSS 3.1CRITICAL 9.9

See all 26 →

Sources

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