Is CVE-2013-4207 in the CISA KEV catalog?

No. CVE-2013-4207 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-4207?

CVE-2013-4207 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2013-4207?

CVE-2013-4207 has an EPSS score of 1.83% (76th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-4207?

Upgrade filezilla on debian 11 to 3.7.3-1 or later.

CVE & CISA-KEV Catalog

CVE-2013-4207

MEDIUMEPSS 76th pctl

4.3

CVSS v2

NVD

Description

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.

CWE-119Buffer Overflow

How to fix

Remediation Available

filezillaDebian

Fixed in:3.7.3-1CVE-2013-4207

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.83%probability of exploitation in 30 days

76thpercentile

Elevated risk: more likely to be exploited than 76% of all known CVEs.

References

Vendor Advisory2

Other references4

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.