CVE-2026-101203

MEDIUM 6.3

FastStone Image Viewer 1bpp RLE Decoder out-of-bounds write

CVSS Score

6.3

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability has been found in FastStone Image Viewer up to 8.3. The impacted element is an unknown function of the component 1bpp RLE Decoder. The manipulation leads to out-of-bounds write. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-787 CWE-119
Vendor	faststone
Product	image viewer
Published	Sep 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

FastStone / Image Viewer

8.0 8.1 8.2 8.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/411012 vuldb.com: https://vuldb.com/vuln/411012/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101203 vuldb.com: https://vuldb.com/submit/907575

Credits

🔍 jonzab (VulDB User) VulDB CNA Team