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Fencer Vulns
medium 5.3

CVE-2021-1499 json

Cisco HyperFlex HX Data Platform File Upload Vulnerability

published 2021-05-06 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-6966

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
80.0%
EPSS 80.0% chance of exploitation in 30 days, percentile 99.6%
public exploits
1
Metasploit, plus a Nuclei check

Summary

A vulnerability in the web-based management interface of Cisco HyperFlex HX Data Platform could allow an unauthenticated, remote attacker to upload files to an affected device. This vulnerability is due to missing authentication for the upload function. An attacker could exploit this vulnerability by sending a specific HTTP request to an affected device. A successful exploit could allow the attacker to upload files to the affected device with the permissions of the tomcat8 user.

Patch / fix

  • cisco hyperflex_hx_data_platform 4.0\(2e\), 4.5\(2a\)

Timeline

  1. First public exploit (Metasploit exploit/linux/http/cisco_hyperflex_file_upload_rce)
  2. Published

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

79.98% chance of exploitation in the next 30 days, higher than 99.6% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

  • Cisco Cisco HyperFlex HX Data Platform

Classification

Weakness
  • CWE-306 Missing Authentication for Critical Functionality

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.