CVE-2026-101203 AKAOMA CVE VULNERABILITIES / 13h 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.

6.3 /10 High Risk If left unpatched, CVE-2026-101203 could lead to major system disruptions or data loss.

If left unpatched, CVE-2026-101203 could lead to major system disruptions or data loss.

Attack Complexity Details

Attack Complexity: Low Exploits can be performed without significant complexity or special conditions.

Attack Vector: Network Vulnerability is exploitable over a network without physical access.

Privileges Required: None No privileges are required for exploitation.

Scope: Unchanged Exploit remains within the originally vulnerable component.

User Interaction: Required User interaction is necessary for successful exploitation.

CVE-2026-101203 Details

Status: Received on 28 Sep 2026, 22:17 UTC Published on: 28 Sep 2026, 22:17 UTC

Status: Received on 28 Sep 2026, 22:17 UTC

Published on: 28 Sep 2026, 22:17 UTC

CVSS Release: version 3

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVE-2026-101203 Vulnerability Summary

CVE-2026-101203: 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 this disclosure but did not respond in any way.

Assessing the Risk of CVE-2026-101203

Access Complexity Graph

The exploitability of CVE-2026-101203 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-101203

With low attack complexity and no required privileges, CVE-2026-101203 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-101203, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

Below is the Impact Analysis for CVE-2026-101203, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: Low CVE-2026-101203 could lead to minor leaks of non-critical information without major privacy breaches.

Integrity: Low Exploiting CVE-2026-101203 may cause minor changes to data without severely impacting its accuracy.

Availability: Low CVE-2026-101203 may slightly degrade system performance without fully affecting service availability.

CVE-2026-101203 References

CWE Common Weakness Enumeration

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