CVE-2011-5129
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial...
CVE-2011-5129 is a medium vulnerability (CVSS 5.0) in Xchat, published August 30, 2012. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 7.70%, the 94th percentile. No source names a fixed version.
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
Exploit likelihood
What each source reports
NVD Score used
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
- Record
CVE-2011-5129- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
- Record
CVE-2011-5129- Updated
- 2026-11-02
EUVDEUVD-2011-5029 No score
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
- Record
EUVD-2011-5029- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q42x-qq8c-c587 No score
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial...
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
- Record
GHSA-q42x-qq8c-c587- Weakness
- CWE-119
- Updated
- 2026-11-02
OSV No score
Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.
- Record
CVE-2011-5129- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | XChat 2.8.9 - Heap Overflow Denial of Service | 2011-11-25 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | affected | |
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |