UpHeron
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Servers and applications

CVE-2013-1661

VMware ESXi 4.0 through 5.1, and ESX 4.0 and 4.1, does not properly implement the Network File Copy (NFC) protocol, which allows man-in-the-middle attackers to cause a denial of service (unhandled exception and application crash) by modifying the client-server data stream.

Severity
Medium 4.3
Published
4 Sept 2013
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
1.1% in the next 30 daysHigher than 66% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
VMware ESXiServers and applications · cpe:o:vmware:esxi
  • Version 5.1
  • Version 5.0-2
  • Version 5.0-1
  • Version 5.0
All 12 release lines
  • Version 4.0
  • Version 4.0-1
  • Version 4.0-2
  • Version 4.0-3
  • Version 4.0-4
  • Version 4.1
  • Version 4.1-1
  • Version 4.1-2
  • Version 5.0
  • Version 5.0-1
  • Version 5.0-2
  • Version 5.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2013-1661
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2013-1661