Is CVE-2016-1252 in the CISA KEV catalog?

No. CVE-2016-1252 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1252?

CVE-2016-1252 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2016-1252?

CVE-2016-1252 has an EPSS score of 7.31% (94th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1252?

Upgrade apt on debian 11 to 1.4~beta2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-1252

MEDIUMEPSS 94th pctl

5.9

CVSS v3

NVD

Description

The apt package in Debian jessie before 1.0.9.8.4, in Debian unstable before 1.4~beta2, in Ubuntu 14.04 LTS before 1.0.1ubuntu2.17, in Ubuntu 16.04 LTS before 1.2.15ubuntu0.2, and in Ubuntu 16.10 before 1.3.2ubuntu0.1 allows man-in-the-middle attackers to bypass a repository-signing protection mechanism by leveraging improper error handling when validating InRelease file signatures.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

aptDebian

Fixed in:1.4~beta2CVE-2016-1252

aptUbuntu

Fixed in:1.0.1ubuntu2.17USN-3156-1

Fixed in:1.2.15ubuntu0.2USN-3156-1

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 VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

7.31%probability of exploitation in 30 days

94thpercentile

High risk: more likely to be exploited than 94% of all known CVEs.

References

Exploit3

Vendor Advisory1

debian.org

Third-Party Advisory2

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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 2026-05-13.