TI-2021-01335 Aliases CVE-2021-1612 GHSA-hpj4-vj9f-q9hf

Cisco IOS XE SD-WAN Software Arbitrary File Overwrite Vulnerability

LOW 31CWE-61Published 2021-09-23 · Updated 2024-11-07

Key facts

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

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

Summary

A vulnerability in the Cisco IOS XE SD-WAN Software CLI could allow an authenticated, local attacker to overwrite arbitrary files on the local system. This vulnerability is due to improper access controls on files within the local file system. An attacker could exploit this vulnerability by placing a symbolic link in a specific location on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on an affected device.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0025 16th 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 IOS XE SD-WAN Software	all versions	—	No fix listed	CNA

Cisco IOS XE SD-WAN Software 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::::::::	before 17.3.4	Vulnerable	Cisco

cpe:2.3:a:cisco:sd-wan:*:*:*:*:*:*:*:* Versions before 17.3.4 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-1612
2026-10-03 Alias added: GHSA-hpj4-vj9f-q9hf

References

Patch 1

20210922 Cisco IOS XE SD-WAN Software Arbitrary File Overwrite 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