Is CVE-2016-2181 in the CISA KEV catalog?

No. CVE-2016-2181 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-2181?

CVE-2016-2181 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-2181?

CVE-2016-2181 has an EPSS score of 22.63% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-2181?

Upgrade openssl on debian 11 to 1.0.2i-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2016-2181

HIGHEPSS 97th pctl

7.5

CVSS v3

NVD

Description

The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service (false-positive packet drops) via spoofed DTLS records, related to rec_layer_d1.c and ssl3_record.c.

CWE-189

How to fix

Remediation Available

opensslDebian

Fixed in:1.0.2i-1CVE-2016-2181

libssl1.0.0Ubuntu

Fixed in:1.0.1f-1ubuntu2.20USN-3087-1

Fixed in:1.0.2g-1ubuntu4.4USN-3087-1

opensslUbuntu

Fixed in:1.0.1f-1ubuntu2.20USN-3087-1

Fixed in:1.0.2g-1ubuntu4.4USN-3087-1

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 v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

22.63%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Related Vulnerabilities

Other CWE-189 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2015-1538	High	10.0	99%	-	-
CVE-2006-3747	High	7.6	96%	-	Fix
CVE-2007-0071	High	9.3	93%	-	-
CVE-2015-3829	High	10.0	90%	-	-
CVE-2015-3864	High	10.0	87%	-	-
CVE-2015-1539	High	10.0	86%	-	-

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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 2026-05-06.