CVE-2016-4606Network attack vector

Code execution, data disclosure, and service interruption

Published Feb 21, 2020 · Updated Aug 6, 2024

Multiple security issues in curl before 7.49.1 on Apple OS X before 10.12 allow remote or local attackers to execute code or disclose data. Apple identifies curl as the affected component but does not publish the individual code loci or the incorrect operations performed on untrusted input. The public record leaves each issue's exact gate undisclosed and bounds the combined consequences to code execution, data disclosure, service interruption, security-restriction bypass, and unauthorized actions.

CVSS severity9.8
Critical
EPSS probability3.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Multiple security issues in curl before 7.49.1 on Apple OS X before 10.12 allow remote or local attackers to execute code or disclose data. Apple identifies curl as the affected component but does not publish the individual code loci or the incorrect operations performed on untrusted input. The public record leaves each issue's exact gate undisclosed and bounds the combined consequences to code execution, data disclosure, service interruption, security-restriction bypass, and unauthorized actions.

The record

CVE
CVE-2016-4606
Published
Feb 21, 2020
Updated
Aug 6, 2024
Vendor
curl
Product
curl
Classifications
Unavailable
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 21, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 7.49.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

curl · curlversion=before 7.49.1

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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