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Fencer Vulns
critical 9.8

CVE-2020-13572 json

A heap overflow vulnerability exists in the way the GIF parser decodes LZW compressed streams in Accusoft ImageGear 19.8.

published 2021-02-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-5819

cvss
9.8
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

A heap overflow vulnerability exists in the way the GIF parser decodes LZW compressed streams in Accusoft ImageGear 19.8. A specially crafted malformed file can trigger a heap overflow, which can result in arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

Exploit prediction

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2020-1183 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • n/a Accusoft

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.