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Public proof of conceptFix available

CVE-2016-2183

A public proof of concept exists; no exploitation attested.

  • Published2016-09-01
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTPS session using Triple DES in CBC mode, aka a "Sweet32" attack.

Timeline

dates in UTC
  1. 2016-09-0100:59CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  3. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-2183?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-2183?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
OpenSSL
BranchAffectedFixed in
1.0= 1.0.1ano fix published
1.0= 1.0.1bno fix published
1.0= 1.0.1cno fix published
1.0= 1.0.1dno fix published
1.0= 1.0.1eno fix published
1.0= 1.0.1fno fix published
1.0= 1.0.1gno fix published
1.0= 1.0.1hno fix published
1.0= 1.0.1ino fix published
1.0= 1.0.1jno fix published
1.0= 1.0.1kno fix published
1.0= 1.0.1lno fix published
Node.js
BranchAffectedFixed in
6.x≥ 6.0.0, < 6.7.06.7.0
4.x≥ 4.2.0, < 4.6.04.6.0
4.x≥ 4.0.0, < 4.1.24.1.2
0.12≥ 0.12.0, < 0.12.160.12.16
0.10≥ 0.10.0, < 0.10.470.10.47
Python
BranchAffectedFixed in
3.5≥ 3.5.0, < 3.5.33.5.3
3.4≥ 3.4.0, < 3.4.73.4.7
2.7≥ 2.7.0, < 2.7.132.7.13

6 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2016-2183 Red Hat Product Security1,036 products fixed · 26 known affected

    SSL/TLS: Birthday attack against 64-bit block ciphers (SWEET32)

    nss.src as a component of Red Hat Enterprise Linux 5 · openssl.src as a component of Red Hat Enterprise Linux 5 · openssl097a.src as a component of Red Hat Enterprise Linux 5 · +23 more

  • ICSA-22-160-01 CISA20 known affected

    Mitsubishi Electric Air Conditioning Systems

    AE-200A: Versions 7.97 and prior · AE-200E: Versions 7.97 and prior · AE-200J: Versions 7.97 and prior · +17 more

  • RHSA-2021:2438 Red Hat Product Security6 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.8.2 bug fix and security update

  • ICSA-21-075-02 CISA19 known affected

    GE UR Family (Update A)

    GE Veronva UR B30: <8.10 · GE Veronva UR B90: <8.10 · GE Veronva UR C30: <8.10 · +16 more

  • RHSA-2021:0308 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.6.16 security and bug fix update

  • RHSA-2020:3842 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.5.13 openshift-enterprise-console-container security update

19 more advisories

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2021:2438 · 6 productsFor OpenShift Container Platform 4.8 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.8/release_notes/ocp-4-8-r…
  2. Vendor fix CISA ICSA-21-075-02 · 19 productsGE strongly recommends users with impacted firmware versions update their UR devices to UR firmware Version 8.10 or greater to resolve these vulnerabilities. GE provides additional mitigations and information about these vulnerabilities in GE Publication Number: GES-2021-004 at https://www.gegridso…
  3. Vendor fix Red Hat Product Security RHSA-2021:0308 · 3 productsFor OpenShift Container Platform 4.6 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.6/release_notes/ocp-4-6-r…
  4. Vendor fix Red Hat Product Security RHSA-2020:3842 · 3 productsFor OpenShift Container Platform 4.5 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.5/release_notes/ocp-4-5-r…
  5. Vendor fix Red Hat Product Security RHSA-2020:0451 · 2 productsBefore applying this update, ensure all previously released errata relevant to your system is applied. See the following documentation, which will be updated shortly for release 3.11.170, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: ht…
  6. Vendor fix Red Hat Product Security RHSA-2019:2859 · 1 productFor OpenShift Container Platform 4.1 see the following documentation, which will be updated shortly for release 4.1.18, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.1/release_notes/ocp-4-1…

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedZakyHermawan/Simple-Sweet32
PoC-in-GitHub

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2016-09-01
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2016-2183?

The DES and Triple DES ciphers, as used in the TLS, SSH, and IPSec protocols and other protocols and products, have a birthday bound of approximately four billion blocks, which makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTPS session using Triple DES in CBC mode, aka a "Sweet32" attack.

Is CVE-2016-2183 actively exploited?

A proof-of-concept exploit exists for CVE-2016-2183, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2016-2183?

CVE-2016-2183 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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