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 4.0

9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

EPSS

1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-25)

CWE

CWE-121

Published

2025-09-16

Modified

2026-10-01

Record from

the NVD, synced 2026-10-19

References

• https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/misc/talkative_response.rb
• https://web.archive.org/web/20090116203306/http://www.talkative-irc.com/
• https://www.exploit-db.com/exploits/16459
• https://www.exploit-db.com/exploits/8227
• https://www.vulncheck.com/advisories/talkative-irc-response-buffer-overflow

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