Is CVE-2013-5211 in the CISA KEV catalog?

No. CVE-2013-5211 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-5211?

CVE-2013-5211 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2013-5211?

CVE-2013-5211 has an EPSS score of 97.76% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2013-5211?

Upgrade ntp on debian 11 to 1:4.2.8p3+dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2013-5211

MEDIUMEPSS 100th pctl

5.0

CVSS v2

NVD

Description

The monlist feature in ntp_request.c in ntpd in NTP before 4.2.7p26 allows remote attackers to cause a denial of service (traffic amplification) via forged (1) REQ_MON_GETLIST or (2) REQ_MON_GETLIST_1 requests, as exploited in the wild in December 2013.

CWE-20Improper Input Validation

How to fix

Remediation Available

ntpDebian

Fixed in:1:4.2.8p3+dfsg-1CVE-2013-5211

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

97.76%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

References

Patch1

eecis.udel.edu

Third-Party Advisory10

Issue Tracking1

bugs.ntp.org

Mailing List3

Other references6

Related Vulnerabilities

Other CWE-20 (Improper Input Validation) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3400	Critical	10.0	100%	KEV + Ransom	-
CVE-2021-45105	Medium	5.9	100%	-	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2018-7600	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-3452	High	7.5	100%	KEV	Fix

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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.