How severe is CVE-2017-8420?

CVE-2017-8420 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-8420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-8420?

CVE-2017-8420 affects Swftools. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-8420?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-8420 published?

CVE-2017-8420 was published on 2017-07-05 and last updated on 2026-06-17.

CVE-2017-8420

CVE-2017-8420 is a medium-severity vulnerability in Swftools with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Swftools
Published: 2017-07-05
Last modified: 2026-06-17

Description

SWFTools 2013-04-09-1007 on Windows has a "Data from Faulting Address controls Branch Selection starting at image00000000_00400000+0x0000000000003e71" issue. This issue can be triggered by a malformed TTF file that is mishandled by font2swf. Attackers could exploit this issue for DoS (Access Violation).

Frequently asked questions

What is CVE-2017-8420?: SWFTools 2013-04-09-1007 on Windows has a "Data from Faulting Address controls Branch Selection starting at image00000000_00400000+0x0000000000003e71" issue. This issue can be triggered by a malformed TTF file that is mishandled by font2swf. Attackers could exploit this issue for DoS (Access Violation).
How severe is CVE-2017-8420?: CVE-2017-8420 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-8420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-8420?: CVE-2017-8420 affects Swftools. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-8420?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-8420 published?: CVE-2017-8420 was published on 2017-07-05 and last updated on 2026-06-17.

References

https://github.com/wlinzi/security_advisories/tree/master/CVE-2017-8420

Affected products (1)

cpe:2.3:a:swftools:swftools:2013-04-09-1007:*:*:*:*:*:*:*

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