CVE-2022-36947
CWE-787Published: August 18, 2022· Updated: Jun 17, 2026
Official Description
Unsafe Parsing of a PNG tRNS chunk in FastStone Image Viewer through 7.5 results in a stack buffer overflow.
Risk Analysis
FastStone Image Viewer versions through 7.5 contain a stack buffer overflow vulnerability triggered by unsafe parsing of PNG tRNS chunks. This critical flaw allows remote attackers to potentially execute arbitrary code, as indicated by the 9.8 CVSS score.
No public exploit is currently known, and the vulnerability is not in the CISA KEV catalog. It is remotely exploitable.
Users should update to the latest version of FastStone Image Viewer and avoid opening untrusted image files.
Technical Analysis
CVE-2022-36947 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (6)
Quick Facts
Related CVEs (CWE-787)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-36947 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts