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TI-2026-80545 Aliases CVE-2026-116463GHSA-8w68-9h8m-jw4f

Out-of-bounds read in FastStone Image Viewer downsampler

Priority MEDIUM 57CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

FastStone Image Viewer up to 8.5 has an out-of-bounds read in the function FUN_0062d96c of its Box-Average Downsampler Engine (CWE-125). A remote attacker can trigger it by manipulating input, and user interaction is required. The vendor was contacted early about this disclosure but did not respond.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Description from the CNA

A vulnerability was identified in FastStone Image Viewer up to 8.5. Affected is the function FUN_0062d96c of the component Box-Average Downsampler Engine. The manipulation leads to out-of-bounds read. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FastStoneImage Viewer8.0; 8.1; 8.2; 8.3; 8.4; 8.5—No fix listedCNA
  • Image Viewer VendorFastStone Affected 8.0; 8.1; 8.2; 8.3; 8.4; 8.5 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:faststone:image_viewer:*:*:*:*:*:*:*:*——FastStone
  • cpe:2.3:a:faststone:image_viewer:*:*:*:*:*:*:*:* Versions — — ·FastStone

Remediation

The sources list no fixed version for FastStone Image Viewer.

Written with Claude Haiku 5.5 from the sources below · 2026-11-02

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116463
  2. 2026-10-27 Alias added: GHSA-8w68-9h8m-jw4f
  3. 2026-11-02 CISA SSVC decision points changed
  4. 2026-11-02 Priority changed: LOW → MEDIUM

References

—

  • TI-2007-01864 Integer overflow in FastStone Image Viewer 2.9 allows context-dependent attackers to… CVSS 2.0HIGH 9.3
  • TI-2022-17153 Unsafe Parsing of a PNG tRNS chunk in FastStone Image Viewer through 7.5 results in a stack buffer overflow. CVSS 3.1CRITICAL 9.8
  • TI-2021-08098 FastStone Image Viewer <= 7.5 is affected by a user mode write access violation at… CVSS 3.1HIGH 7.8
  • TI-2021-08097 FastStone Image Viewer v.<= 7.5 is affected by a Stack-based Buffer Overflow at… CVSS 3.1HIGH 7.8
  • TI-2024-08464 Out-of-bounds write in FastStone Image Viewer CVSS 3.1HIGH 7.8
  • TI-2024-08463 Out-of-bounds write in FastStone Image Viewer CVSS 3.1HIGH 7.8
See all 38 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences