Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in…
Priority HIGH 67CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Stack-based buffer overflow in the ClientConnection::NegotiateProtocolVersion function in vncviewer/ClientConnection.cpp in vncviewer for UltraVNC 1.0.2 and 1.0.4 before 01252008, when in LISTENING mode or when using the DSM plugin, allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a modified size value.
Why it matters now
EPSS 0.38757 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ultravnc:ultravnc:1.0.2:*:*:*:*:*:*:* | 1.0.2 | Vulnerable | UltraVNC |
| cpe:2.3:a:ultravnc:ultravnc:1.0.4:*:*:*:*:*:*:* | 1.0.4 | Vulnerable | UltraVNC |
| cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc6:*:*:*:*:*:*:* | 1.0.4_rc6 | Vulnerable | UltraVNC |
| cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc7:*:*:*:*:*:*:* | 1.0.4_rc7 | Vulnerable | UltraVNC |
| cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc8:*:*:*:*:*:*:* | 1.0.4_rc8 | Vulnerable | UltraVNC |
- cpe:2.3:a:ultravnc:ultravnc:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·UltraVNC
- cpe:2.3:a:ultravnc:ultravnc:1.0.4:*:*:*:*:*:*:* Versions 1.0.4 Vulnerable ·UltraVNC
- cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc6:*:*:*:*:*:*:* Versions 1.0.4_rc6 Vulnerable ·UltraVNC
- cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc7:*:*:*:*:*:*:* Versions 1.0.4_rc7 Vulnerable ·UltraVNC
- cpe:2.3:a:ultravnc:ultravnc:1.0.4_rc8:*:*:*:*:*:*:* Versions 1.0.4_rc8 Vulnerable ·UltraVNC
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2008-0610
- 2026-10-03 Alias added: GHSA-vm88-xwrf-p2q7
References
Exploit 1
Advisory 1
Other 4
More Ultravnc vulnerabilities
- TI-2009-00368 Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9… CVSS 2.0HIGH 10.0
- TI-2008-04755 Multiple stack-based buffer overflows in multiple functions in vncviewer/FileTransfer.cpp… CVSS 2.0HIGH 9.3
- TI-2006-02149 The MS-Logon authentication scheme in UltraVNC (aka Ultr@VNC) 1.0.1 uses weak encryption… CVSS 2.0HIGH 10.0
- TI-2010-04946 Untrusted search path vulnerability in UltraVNC 1.0.8.2 allows local users to gain… CVSS 2.0MEDIUM 6.9
Sources
- CVE-2008-0610 · CVE Program
- CVE-2008-0610 · NVD
- FIRST EPSS
- GHSA-vm88-xwrf-p2q7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences