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Fencer Vulns
high 7.5

CVE-2020-3387 in the critical feed json

Cisco SD-WAN vManage Software Remote Code Execution Vulnerability

published 2020-07-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-24658

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
13.0%
EPSS 13.0% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

A vulnerability in Cisco SD-WAN vManage Software could allow an authenticated, remote attacker to execute code with root privileges on an affected system. The vulnerability is due to insufficient input sanitization during user authentication processing. An attacker could exploit this vulnerability by sending a crafted response to the Cisco SD-WAN vManage Software. A successful exploit could allow the attacker to access the software and execute commands they should not be authorized to execute.

Patch / fix

  • cisco sd-wan_firmware 19.2.3, 20.1.1.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
23 mo ago

Exploit prediction

13.02% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • packetstormsecurity.com http://packetstormsecurity.com/files/162958/Cisco-SD-WAN-vManage-19.2.2-Remote-Root.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Cisco Cisco SD-WAN vManage

Classification

Weakness
  • CWE-20 Improper Input Validation

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.