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CVE-2023-53966VulnerabilityPublished

CVE-2023-53966: SOUND4 LinkAndShare Transmitter · Use of Externally-Controlled Format String

Affects SOUND4 LinkAndShare TransmitterSource CVE Database V5

0

Not known to be exploited · CVSS 9.3 Critical.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score
9.3Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
SOUND4 Ltd. SOUND4 LinkAndShare TransmitterAffected
  • =1.1.2
Fixed in–

AI-suggested

1. Monitor and restrict environment variable inputs, especially the username variable, to prevent injection of malicious format strings. 2. Implement input validation and sanitization routines to ensure environment variables do not contain format specifiers or unexpected characters. 3. Apply network segmentation and firewall rules to limit exposure of SOUND4 LinkAndShare Transmitter instances to untrusted networks. 4. Employ runtime application self-protection (RASP) or memory protection mechanisms to detect and block abnormal memory access patterns indicative of exploitation attempts. 5. Regularly audit and monitor logs for unusual crashes or behavior that may indicate exploitation attempts. 6. Coordinate with SOUND4 Ltd. for timely patch deployment once available and test patches in controlled environments before production rollout. 7. Consider deploying application whitelisting and privilege restrictions to limit the impact of potential code execution. 8. Educate system administrators on the risks of environment variable manipulation and enforce strict operational procedures.

Description

SOUND4 LinkAndShare Transmitter 1.1.2 contains a format string vulnerability that allows attackers to trigger memory stack overflows through maliciously crafted environment variables. Attackers can manipulate the username environment variable with format string payloads to potentially execute arbitrary code and crash the application.

References

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