How severe is CVE-2016-6520?

CVE-2016-6520 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.

Is CVE-2016-6520 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6520?

CVE-2016-6520 affects Imagemagick. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6520?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-6520 published?

CVE-2016-6520 was published on 2016-12-13 and last updated on 2026-06-17.

CVE-2016-6520

CVE-2016-6520 is a critical-severity vulnerability in Imagemagick with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Imagemagick
Published: 2016-12-13
Last modified: 2026-06-17

Description

Buffer overflow in MagickCore/enhance.c in ImageMagick before 7.0.2-7 allows remote attackers to have unspecified impact via vectors related to pixel cache morphology.

Frequently asked questions

What is CVE-2016-6520?: Buffer overflow in MagickCore/enhance.c in ImageMagick before 7.0.2-7 allows remote attackers to have unspecified impact via vectors related to pixel cache morphology.
How severe is CVE-2016-6520?: CVE-2016-6520 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
Is CVE-2016-6520 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6520?: CVE-2016-6520 affects Imagemagick. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6520?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-6520 published?: CVE-2016-6520 was published on 2016-12-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*

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