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Back to active CVEs
Medium · CVSS 6.9CVE-2019-25601

UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow

Answer in brief

CVE-2019-25601 records a Medium severity (CVSS 6.9) vulnerability in UltraVNC Launcher 1.2.2.4 Denial of Service Buffer Overflow. The current sources do not mark it as known exploited. The current feed maps Uvnc/UltraVNC Launcher (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 22, 2026Updated Oct 1, 2026Source checked Oct 2, 2026First seen by HOL Oct 1, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Uvnc/UltraVNC Launcher (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Uvnc/UltraVNC Launchergeneric1.2.2.4Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Uvnc/UltraVNC Launcher.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Mar 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 1, 2026

Sources and claim methodology

  • Source referenceexploit-db.com
  • Source referenceuvnc.com
  • Source referenceuvnc.com
  • Source referencevulncheck.com
Upstream source description

UltraVNC Launcher 1.2.2.4 contains a buffer overflow vulnerability in the Path vncviewer.exe property field that allows local attackers to crash the application by supplying an excessively long string. Attackers can input a 300-byte payload of repeated characters through the Properties dialog to trigger a denial of service condition.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Out-of-bounds write in PeaZip PEA extractor allows code execution via a crafted .pea archiveAlso CWE-787
  • pgvector buffer overflow in IVFFlat index buildAlso CWE-787
  • Office-PowerPoint-MCP-Server through 2.0.7 Path Traversal via save_presentation and manage_imageSame generic ecosystem
  • Wormhole.app SSRFSame generic ecosystem
  • Physical UART Access Leading to an Unauthenticated Root Shell in TP-Link Kasa EC70 and EC71Same generic ecosystem
  • Cadmos LTI exposure of sensitive information via debug modeSame generic ecosystem

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Oct 2, 2026
References
4 linked sources
Open source record