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CVE-2016-5331

22
FAUCET Score

CVE-2016-5331 describes a CRLF injection vulnerability affecting VMware vCenter Server 6.0 before U2 and ESXi 6.0. This flaw allows remote attackers to inject arbitrary HTTP headers, potentially leading to HTTP response splitting attacks. With a CVSS v3 score of 6.1 (MEDIUM), the vulnerability has a network attack vector and low attack complexity, requiring user interaction and potentially impacting confidentiality and integrity. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in CISA's KEV catalog, though it has received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.0CPE matchmatch criteria
cpe:2.3:a:vmware:vcenter_server:*:update_1b:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:vmware:esxi:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.91%
Probability of exploitation in next 30 days
EPSS Percentile
77.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0191 is in the 89th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

vmwarepatch availablevia nvd_reference
View patch

References

packetstormsecurity.com / files/138211/VMware-vSphere-Hypervisor-ESXi-HTTP-Response-Injection.html
seclists.org / fulldisclosure/2016/Aug/38
securityfocus.com / archive/1/539128/100/0/threaded
securityfocus.com / bid/92324
securitytracker.com / id/1036543
securitytracker.com / id/1036544
securitytracker.com / id/1036545
vmware.com / security/advisories/VMSA-2016-0010.html
MitigationPatchVendor Advisory