IAX2 in Asterisk Open Source 1.2.x before 1.2.31, 1.4.x before 1.4.23-rc4, and 1.6.x before 1.6.0.3-rc2; Business Edition A.x.x, B.x.x before B.2.5.7, C.1.x.x before C.1.10.4, and C.2.x.x before C.2.1.2.1; and s800i 1.2.x before 1.3.0 responds differently to a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.
Conclusion & alert: CVE-2009-0041 is rated Moderate Risk (51/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.71%). Core evidence: EPSS rose +1.63% over the last day, indicating growing attacker interest. 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 | 2026-06-15 | 1.08% | 2.71% | +1.63% |
| 2 | 2026-06-10 | 0.86% | 1.08% | +0.22% |
| 3 | 2025-10-16 | — | 0.86% | — |
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
|
low | CVE-2009-0041 low priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2009-0041 |
gentoo
|
normal | CVE-2009-0041: 1 GLSA(s) (200905-01), 1 atom(s) (net-misc/asterisk); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-0041 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2009-0041 |
ubuntu
|
low | CVE-2009-0041 low priority: Ubuntu including 1 source packages (asterisk), 9 status rows across 9 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, upstream): ignored 4, not-affected 3, released 2. | https://ubuntu.com/security/CVE-2009-0041 |
: Vendor Advisory: http://downloads.digium.com/pub/security/AST-2009-001.html
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| asterisk | asterisk_business_edition | <= b.2.5.2 | cpe:2.3:a:asterisk:asterisk_business_edition:*:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | <= c.1.0 | cpe:2.3:a:asterisk:asterisk_business_edition:*:beta8:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | a | cpe:2.3:a:asterisk:asterisk_business_edition:a:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.1.3.2 | cpe:2.3:a:asterisk:asterisk_business_edition:b.1.3.2:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.1.3.3 | cpe:2.3:a:asterisk:asterisk_business_edition:b.1.3.3:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.2.0 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.2.0:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.2.1 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.2.1:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.1 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.1:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.2 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.2:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.3 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.3:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.4 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.4:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.5 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.5:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.3.6 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.3.6:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.5.0 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.5.0:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.5.1 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.5.1:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | b.2.5.3 | cpe:2.3:a:asterisk:asterisk_business_edition:b.2.5.3:*:*:*:*:*:*:* |
| asterisk | asterisk_business_edition | c.1.0 | cpe:2.3:a:asterisk:asterisk_business_edition:c.1.0:beta7:*:*:*:*:*:* |
| asterisk | open_source | <= 1.2.30.4 | cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* |
| asterisk | open_source | <= 1.4.23 | cpe:2.3:a:asterisk:open_source:*:rc3:*:*:*:*:*:* |
| asterisk | open_source | <= 1.6.0.3 | cpe:2.3:a:asterisk:open_source:*:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0 | cpe:2.3:a:asterisk:open_source:1.2.0:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0 | cpe:2.3:a:asterisk:open_source:1.2.0:beta1:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0 | cpe:2.3:a:asterisk:open_source:1.2.0:beta2:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0 | cpe:2.3:a:asterisk:open_source:1.2.0:rc1:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0 | cpe:2.3:a:asterisk:open_source:1.2.0:rc2:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0beta1 | cpe:2.3:a:asterisk:open_source:1.2.0beta1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.0beta2 | cpe:2.3:a:asterisk:open_source:1.2.0beta2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.1 | cpe:2.3:a:asterisk:open_source:1.2.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.2 | cpe:2.3:a:asterisk:open_source:1.2.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.2 | cpe:2.3:a:asterisk:open_source:1.2.2:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.3 | cpe:2.3:a:asterisk:open_source:1.2.3:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.3 | cpe:2.3:a:asterisk:open_source:1.2.3:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.10 | cpe:2.3:a:asterisk:open_source:1.2.10:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.10 | cpe:2.3:a:asterisk:open_source:1.2.10:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.11 | cpe:2.3:a:asterisk:open_source:1.2.11:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.11 | cpe:2.3:a:asterisk:open_source:1.2.11:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.12 | cpe:2.3:a:asterisk:open_source:1.2.12:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.12 | cpe:2.3:a:asterisk:open_source:1.2.12:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.12.1 | cpe:2.3:a:asterisk:open_source:1.2.12.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.12.1 | cpe:2.3:a:asterisk:open_source:1.2.12.1:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.13 | cpe:2.3:a:asterisk:open_source:1.2.13:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.13 | cpe:2.3:a:asterisk:open_source:1.2.13:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.14 | cpe:2.3:a:asterisk:open_source:1.2.14:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.14 | cpe:2.3:a:asterisk:open_source:1.2.14:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.15 | cpe:2.3:a:asterisk:open_source:1.2.15:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.15 | cpe:2.3:a:asterisk:open_source:1.2.15:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.16 | cpe:2.3:a:asterisk:open_source:1.2.16:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.16 | cpe:2.3:a:asterisk:open_source:1.2.16:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.17 | cpe:2.3:a:asterisk:open_source:1.2.17:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.17 | cpe:2.3:a:asterisk:open_source:1.2.17:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.18 | cpe:2.3:a:asterisk:open_source:1.2.18:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.18 | cpe:2.3:a:asterisk:open_source:1.2.18:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.19 | cpe:2.3:a:asterisk:open_source:1.2.19:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.19 | cpe:2.3:a:asterisk:open_source:1.2.19:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.20 | cpe:2.3:a:asterisk:open_source:1.2.20:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.20 | cpe:2.3:a:asterisk:open_source:1.2.20:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.21 | cpe:2.3:a:asterisk:open_source:1.2.21:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.21 | cpe:2.3:a:asterisk:open_source:1.2.21:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.21.1 | cpe:2.3:a:asterisk:open_source:1.2.21.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.21.1 | cpe:2.3:a:asterisk:open_source:1.2.21.1:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.22 | cpe:2.3:a:asterisk:open_source:1.2.22:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.22 | cpe:2.3:a:asterisk:open_source:1.2.22:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.23 | cpe:2.3:a:asterisk:open_source:1.2.23:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.23 | cpe:2.3:a:asterisk:open_source:1.2.23:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.24 | cpe:2.3:a:asterisk:open_source:1.2.24:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.24 | cpe:2.3:a:asterisk:open_source:1.2.24:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.25 | cpe:2.3:a:asterisk:open_source:1.2.25:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.25 | cpe:2.3:a:asterisk:open_source:1.2.25:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26 | cpe:2.3:a:asterisk:open_source:1.2.26:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26 | cpe:2.3:a:asterisk:open_source:1.2.26:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26.1 | cpe:2.3:a:asterisk:open_source:1.2.26.1:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26.1 | cpe:2.3:a:asterisk:open_source:1.2.26.1:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26.2 | cpe:2.3:a:asterisk:open_source:1.2.26.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.26.2 | cpe:2.3:a:asterisk:open_source:1.2.26.2:netsec:*:*:*:*:*:* |
| asterisk | open_source | 1.2.27 | cpe:2.3:a:asterisk:open_source:1.2.27:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.28 | cpe:2.3:a:asterisk:open_source:1.2.28:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.29 | cpe:2.3:a:asterisk:open_source:1.2.29:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.30 | cpe:2.3:a:asterisk:open_source:1.2.30:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.30.2 | cpe:2.3:a:asterisk:open_source:1.2.30.2:*:*:*:*:*:*:* |
| asterisk | open_source | 1.2.30.3 | cpe:2.3:a:asterisk:open_source:1.2.30.3:*:*:*:*:*:*:* |