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Vulnerabilities

Vulnerability · CVE-2016-5331

CRLF injection vulnerability in VMware vCenter Server 6.0 before U2 and ESXi 6.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response spl…

Published Aug 8, 2016 · catalog updated Jun 17, 2026 · vcenter server

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2016-5331. EPSS is 1.91%. Act only if a listed version of vcenter server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.91%
Remediation
Version ranges on file
Affected products
cpe vmware/esxi · cpe vmware/vcenter server

CRLF injection vulnerability in VMware vCenter Server 6.0 before U2 and ESXi 6.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vmware/esxi6.0
  • cpe vmware/vcenter server<= 6.0

How to fix CVE-2016-5331

  • Upgrade

    CVE-2016-5331 lists a fix boundary at 6.0. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 6.0

  • Advisory

    Open the inventory_critical record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2016-5331. EPSS is 1.91%. Act only if a listed version of vcenter server is installed.

Which versions are affected?

Compare what you have installed with vmware/vcenter server <= 6.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-93. EPSS 1.91%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

VMware security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 8, 2016 · Monitored products — critical

    Detected

    CRLF injection vulnerability in VMware vCenter Server 6.0 before U2 and ESXi 6.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

  2. Jun 17, 2026 · Monitored products — critical

    Updated

    CRLF injection vulnerability in VMware vCenter Server 6.0 before U2 and ESXi 6.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

Sources

  • Monitored products — criticalVendor advisoryCVE-2016-5331

    CRLF injection vulnerability in VMware vCenter Server 6.0 before U2 and ESXi 6.0 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via unspecified vectors.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — criticalOct 31, 2026