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Fencer Vulns
medium 4.4

CVE-2021-1514 json

Cisco SD-WAN Software Privilege Escalation Vulnerability

published 2021-05-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-6981

cvss
4.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

A vulnerability in the CLI of Cisco SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with Administrator privileges on the underlying operating system. This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to the device and submitting crafted input to the CLI. The attacker must be authenticated as a low-privileged user to execute the affected commands. A successful exploit could allow the attacker to execute commands with Administrator privileges.

Patch / fix

  • cisco catalyst_sd-wan_manager 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco sd-wan_vbond_orchestrator 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco sd-wan_vmanage 18.3
  • cisco vsmart_controller_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_100_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_1000_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_100b_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_100m_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_100wm_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_2000_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_5000_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge-100b_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1
  • cisco vedge_cloud_firmware 18.3, 20.1.1, 20.3.1, 20.4.1, 20.5.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 4.4 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Cisco Cisco SD-WAN Solution

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.