Unscored severity · published Sep 4, 2013
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…
–
CVSS
1.1%
EPSS
No
On KEV
Description
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 66% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
ESXi · VMware
4.0; 4.0; 4.0; 4.0; 4.0; 4.1; +6 more · source: NVD
ES
Esx · Vmware
4.0; 4.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2013-1661
CVE.org
https://www.cve.org/CVERecord?id=CVE-2013-1661
Vendor Advisory
http://www.vmware.com/security/advisories/VMSA-2013-0011.html
More from ESXi
9.8
CVE-2020-3992
VMware ESXi OpenSLP Use-After-Free Vulnerability
9.8
CVE-2019-5544
VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
8.2
CVE-2025-22225
VMware ESXi Arbitrary Write Vulnerability
8.2
CVE-2025-22224
VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
7.8
CVE-2010-3904
Linux Kernel Improper Input Validation Vulnerability