How severe is CVE-2016-6491?

CVE-2016-6491 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-6491 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6491?

CVE-2016-6491 primarily affects Imagemagick. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-6491?

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

When was CVE-2016-6491 published?

CVE-2016-6491 was published on 2016-12-13 and last updated on 2026-06-17.

CVE-2016-6491

CVE-2016-6491 is a high-severity vulnerability in Imagemagick with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 5% (91st 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 the Get8BIMProperty function in MagickCore/property.c in ImageMagick before 6.9.5-4 and 7.x before 7.0.2-6 allows remote attackers to cause a denial of service (out-of-bounds read, memory leak, and crash) via a crafted image.

Frequently asked questions

What is CVE-2016-6491?: Buffer overflow in the Get8BIMProperty function in MagickCore/property.c in ImageMagick before 6.9.5-4 and 7.x before 7.0.2-6 allows remote attackers to cause a denial of service (out-of-bounds read, memory leak, and crash) via a crafted image.
How severe is CVE-2016-6491?: CVE-2016-6491 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-6491 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6491?: CVE-2016-6491 primarily affects Imagemagick. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-6491?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6491 published?: CVE-2016-6491 was published on 2016-12-13 and last updated on 2026-06-17.

References

Affected products (20)

cpe:2.3:a:imagemagick:imagemagick:*:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-0:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-1:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-2:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-3:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-4:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-5:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-6:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-7:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-8:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-9:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.1-10:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-0:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-1:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-2:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-3:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-4:*:*:*:*:*:*:*
cpe:2.3:a:imagemagick:imagemagick:7.0.2-5:*:*:*:*:*:*:*
cpe:2.3:o:oracle:solaris:10.0:*:*:*:*:*:*:*
cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*

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