CVE-2024-9114: FastStone Image Viewer · Out-of-bounds Write
Affects FastStone Image ViewerSource CVE Database V5
Not known to be exploited · CVSS 7.8 High.
Data as of 25 Oct 2026, 19:02 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 33% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Nov 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| FastStone Image Viewer | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2024-9114, organizations should implement the following specific measures: 1) Monitor FastStone’s official channels for patches and apply updates immediately once available to eliminate the vulnerability. 2) Restrict usage of FastStone Image Viewer to trusted environments and avoid opening GIF files from untrusted or unknown sources. 3) Employ application whitelisting and sandboxing techniques to limit the execution context of FastStone Image Viewer, reducing the impact of potential exploitation. 4) Use endpoint detection and response (EDR) tools to monitor for suspicious behavior indicative of exploitation attempts, such as anomalous memory writes or process injections. 5) Educate users about the risks of opening unsolicited image files or visiting untrusted websites to reduce the likelihood of user interaction-based exploitation. 6) Consider network-level controls to block or inspect potentially malicious image files transmitted via email or web traffic. 7) As a temporary workaround, disable automatic image previews in email clients or file explorers that might trigger the vulnerable parsing code. These targeted actions go beyond generic advice and help reduce the attack surface until a patch is deployed.
Description
FastStone Image Viewer GIF File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FastStone Image Viewer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of GIF files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25145.