The png_load function in lib/png.c in SWFTools 0.9.2 does not properly validate a multiplication of width and bits-per-pixel values, which allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted file, as demonstrated by an erroneous png_load call that occurs because of incorrect integer data types in png2swf.
CVE-2017-16794
MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence
Score 5.5 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.5
- EG Score
- 5.5(medium)
- EPSS
- 59.3%
- KEV
- Not listed
Published
November 12, 2017
Last Modified
May 13, 2026
References (2)
- cve@mitrehttps://github.com/matthiaskramm/swftools/issues/50
- af854a3a-2127-422b-91ae-364da2661108https://github.com/matthiaskramm/swftools/issues/50
Frequently asked(5)
What is CVE-2017-16794?
CVE-2017-16794 is a medium vulnerability published on November 12, 2017. The pngload function in lib/png.c in SWFTools 0.9.2 does not properly validate a multiplication of width and bits-per-pixel values, which allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted file, as demonstrated by an erroneous…
When was CVE-2017-16794 disclosed?
CVE-2017-16794 was first published in the National Vulnerability Database on November 12, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-16794 actively exploited?
CVE-2017-16794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-16794?
CVE-2017-16794 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2017-16794?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-16794, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
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