How severe is CVE-2017-16869?

CVE-2017-16869 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-16869 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16869?

CVE-2017-16869 affects Upx. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-16869?

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-2017-16869 published?

CVE-2017-16869 was published on 2017-11-17 and last updated on 2026-06-17.

CVE-2017-16869

CVE-2017-16869 is a high-severity vulnerability in Upx with a CVSS 3.x base score of 7.8. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Upx
Published: 2017-11-17
Last modified: 2026-06-17

Description

p_mach.cpp in UPX 3.94 allows remote attackers to cause a denial of service (invalid memory access and application crash) or possibly have unspecified other impact via a crafted Mach-O file, related to canPack and unpack functions. NOTE: the vendor has stated "there is no security implication whatsoever.

Frequently asked questions

What is CVE-2017-16869?: p_mach.cpp in UPX 3.94 allows remote attackers to cause a denial of service (invalid memory access and application crash) or possibly have unspecified other impact via a crafted Mach-O file, related to canPack and unpack functions. NOTE: the vendor has stated "there is no security implication whatsoever.
How severe is CVE-2017-16869?: CVE-2017-16869 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-16869 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16869?: CVE-2017-16869 affects Upx. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16869?: 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-2017-16869 published?: CVE-2017-16869 was published on 2017-11-17 and last updated on 2026-06-17.

References

https://github.com/upx/upx/issues/146

Affected products (1)

cpe:2.3:a:upx:upx:3.94:*:*:*:*:*:*:*

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