CVE-2020-14002

mediumpriority · track · 25EPSS 0.031 · 88 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.13% (88th) EPSS

CVSS 4.3 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

PuTTY 0.68 through 0.73 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client).

cvss

Technical severity, 0–10. One row per scoring source.

5.9

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.15.9mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.2 · impact 3.6

v3.15.4mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-203USprimary

affected products (9)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
NetApp ActiveIQ Unified Managerall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:-
Open Source PuTTY <=0.73all versionscert_bundDE
Open Source PuTTY≤ 0.73cert_bundDE
n/a n/a≤ n/aenisa_euvdEU
fedoraproject fedora= 31nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 32nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
netapp oncommand unified manager core packageall versionsnvdUScpe:2.3:a:netapp:oncommand_unified_manager_core_package:*:*:*:*:*:*:*:*
putty putty0.68 → 0.73nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-0975PuTTY: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2020-06-29csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in PuTTY ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2020-06-29modified 2026-06-17

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+882 more

references (23)

External citations — patches, advisories, analysis.

scry

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