Wee Enhanced Environment for Chat (WeeChat) 0.2.6 allows remote attackers to cause a denial of service (crash) via an IRC PRIVMSG command containing crafted color codes that trigger an out-of-bounds read.
Conclusion & alert: CVE-2009-0661 is rated Moderate Risk (46.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.98%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-03-30 | 4.29% | 1.98% | -2.31% |
| 2 | 2025-03-29 | 1.98% | 4.29% | +2.31% |
| 3 | 2025-03-19 | — | 1.98% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
medium | CVE-2009-0661 medium priority: Debian including 1 source packages (weechat), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2009-0661 |
gentoo
|
normal | CVE-2009-0661: 1 GLSA(s) (200904-04), 1 atom(s) (net-irc/weechat); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-0661 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2009-0661 |
ubuntu
|
low | CVE-2009-0661 low priority: Ubuntu including 1 source packages (weechat), 7 status rows across 7 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 3, ignored 2, not-affected 2. | https://ubuntu.com/security/CVE-2009-0661 |