Is CVE-2016-1531 in the CISA KEV catalog?

No. CVE-2016-1531 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1531?

CVE-2016-1531 has a CVSS v3 base score of 7.0 (HIGH).

What is the EPSS score for CVE-2016-1531?

CVE-2016-1531 has an EPSS score of 5.90% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1531?

Upgrade exim4 on debian 11 to 4.86.2-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2016-1531

HIGHEPSS 92th pctl

7.0

CVSS v3

NVD

Description

Exim before 4.86.2, when installed setuid root, allows local users to gain privileges via the perl_startup argument.

CWE-264Permissions, Privileges, and Access Controls

How to fix

Remediation Available

exim4Debian

Fixed in:4.86.2-1CVE-2016-1531

exim4Ubuntu

Fixed in:4.82-3ubuntu2.1USN-2933-1

exim4-daemon-heavyUbuntu

Fixed in:4.82-3ubuntu2.1USN-2933-1

exim4-daemon-lightUbuntu

Fixed in:4.82-3ubuntu2.1USN-2933-1

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 VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

5.90%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Exploit2

Third-Party Advisory1

exim.org

Other references7

Related Vulnerabilities

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2012-1456	Medium	4.3	100%	-	-
CVE-2012-1459	Medium	4.3	100%	-	Fix
CVE-2012-1446	Medium	4.3	100%	-	-
CVE-2012-1443	Medium	4.3	100%	-	-
CVE-2012-1442	Medium	4.3	99%	-	-
CVE-2012-1457	Medium	4.3	98%	-	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 2026-05-06.