CVE-2009-20007

Talkative IRC v0.4.4.16 is vulnerable to a stack-based buffer overflow when processing specially crafted response strings sent to a connected client. An attacker can exploit this flaw by sending an overly long message that overflows a fixed-length buffer, potentially leading to arbitrary code execution in the context of the vulnerable process. This vulnerability is exploitable remotely and does not require authentication.

CVSS v4.0

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS

1.40% chance of exploitation in the next 30 days, 71th percentile

Published

2025-09-16

Updated

2026-05-15

Proof-of-concept exploits (3)

• https://www.exploit-db.com/exploits/16459
• https://www.exploit-db.com/exploits/8227
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2009-4909.php

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/windows/misc/talkative_response.…

References

• CVE Record
• NVD entry

Related

• CVE-2009-20006
• CVE-2009-20008
• CVE-2009-20005
• CVE-2009-20009
• CVE-2009-20004
• CVE-2009-20010