CVE-2013-4207

mediumpriority · track · 18EPSS 0.018 · 79 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.83% (79th) EPSS

CVSS 4.3 · medium

Is it mine?

21 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

cvss

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

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4.3

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

v2.03.7lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimary

affected products (21)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
putty putty= 0.45nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.46nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.47nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.48nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.49nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.50nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.51nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.52nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.53bnvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.54nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.55nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.56nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.57nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.58nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.59nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.60nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 0.61nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
putty putty= 2010-06-01nvdUScpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
simon tatham putty≤ 0.62nvdUScpe:2.3:a:simon_tatham:putty:*:*:*:*:*:*:*:*

showing 20 of 21

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2013-08-19modified 2026-06-16

related (21,044)

Related entries.

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+21039 more

references (19)

External citations — patches, advisories, analysis.

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