CVE-2023-53966

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2025-12-23. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

December 22, 2025

Last Modified

December 31, 2025

Advisory Details (4)

Auto-updated Jul 28, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Zero Science Lab — Information Security Research & Development Laboratory

https://www.zeroscience.mk/en/vulnerabilities/ZSL-2023-5744.php
generic

SOUND4 LinkAndShare Transmitter 1.1.2 Format String Stack Buffer Overflow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sound-linkandshare-transmitter-format-string-stack-buffer-overflow
generic🟡 PoC Available

SOUND4 LinkAndShare Transmitter 1.1.2 - Format String Stack Buffer Overflow - Hardware remote Exploit

https://www.exploit-db.com/exploits/51259
generic

SOUND4 - BIG SOUND | small price

https://web.archive.org/web/20221207074555/https://www.sound4.com/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-28 15:34 UTCEPSS rescore
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  3. 2026-07-26 14:53 UTCEPSS rescore
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  7. 2026-07-23 02:30 UTCEG score recompute
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  1. 2026-07-12 05:45 UTCEPSS rescore
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  22. 2026-06-25 13:48 UTCEPSS rescore
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  44. 2026-06-12 23:11 UTCEPSS rescore
  45. 2026-06-11 13:59 UTCEPSS rescore
  46. 2026-06-10 22:17 UTCEPSS rescore
  47. 2026-06-10 13:21 UTCEPSS rescore
  48. 2026-06-08 14:16 UTCEPSS rescore
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  50. 2026-06-07 15:24 UTCEPSS rescore
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  52. 2026-06-06 13:46 UTCEPSS rescore
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  58. 2026-06-04 13:11 UTCEPSS rescore
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  60. 2026-06-02 20:12 UTCEPSS rescore
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  65. 2026-05-31 00:15 UTCEPSS rescore
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  67. 2026-05-29 17:06 UTCEG score recompute
  68. 2026-05-29 17:06 UTCGHSA enrichment
  69. 2026-05-29 13:43 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-53966?
CVE-2023-53966 is a critical vulnerability published on December 22, 2025. 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…
When was CVE-2023-53966 disclosed?
CVE-2023-53966 was first published in the National Vulnerability Database on December 22, 2025, with the most recent update on December 31, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53966 actively exploited?
CVE-2023-53966 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.9% of all scored CVEs.
What is the CVSS score of CVE-2023-53966?
CVE-2023-53966 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2023-53966?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53966, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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