Multiple format string vulnerabilities in lib/silcclient/client_entry.c in Secure Internet Live Conferencing (SILC) Toolkit before 1.1.10, and SILC Client before 1.1.8, allow remote attackers to execute arbitrary code via format string specifiers in a nickname field, related to the (1) silc_client_add_client, (2) silc_client_update_client, and (3) silc_client_nickname_format functions.
Conclusion & alert: CVE-2009-3051 is rated Moderate Risk (63.6/100): CVSS High severity, with high exploitation likelihood (EPSS 9.09%, 92th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +1.47% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize 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 | 2025-04-08 | 7.62% | 9.09% | +1.47% |
| 2 | 2025-03-30 | 16.50% | 7.62% | -8.87% |
| 3 | 2025-03-29 | — | 16.50% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2009-3051: 1 GLSA(s) (201006-07), 2 atom(s) (net-im/silc-client, net-im/silc-toolkit); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-3051 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2009-3051 |
ubuntu
|
low | CVE-2009-3051 low priority: Ubuntu including 3 source packages (silc-client, silc-server, silc-toolkit), 30 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 21, ignored 4, released 3, DNE 2. | https://ubuntu.com/security/CVE-2009-3051 |
Not vulnerable. This issue did not affect the versions of libsilc as shipped with Red Hat Enterprise Linux 4, or 5.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| silcnet | silc_client | <= 1.1.7 | cpe:2.3:a:silcnet:silc_client:*:*:*:*:*:*:*:* |
| silcnet | silc_client | 1.1.1 | cpe:2.3:a:silcnet:silc_client:1.1.1:*:*:*:*:*:*:* |
| silcnet | silc_client | 1.1.2 | cpe:2.3:a:silcnet:silc_client:1.1.2:*:*:*:*:*:*:* |
| silcnet | silc_client | 1.1.3 | cpe:2.3:a:silcnet:silc_client:1.1.3:*:*:*:*:*:*:* |
| silcnet | silc_client | 1.1.4 | cpe:2.3:a:silcnet:silc_client:1.1.4:*:*:*:*:*:*:* |
| silcnet | silc_client | 1.1.6 | cpe:2.3:a:silcnet:silc_client:1.1.6:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | <= 1.1.9 | cpe:2.3:a:silcnet:silc_toolkit:*:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1 | cpe:2.3:a:silcnet:silc_toolkit:1.1:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.1 | cpe:2.3:a:silcnet:silc_toolkit:1.1.1:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.2 | cpe:2.3:a:silcnet:silc_toolkit:1.1.2:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.3 | cpe:2.3:a:silcnet:silc_toolkit:1.1.3:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.4 | cpe:2.3:a:silcnet:silc_toolkit:1.1.4:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.5 | cpe:2.3:a:silcnet:silc_toolkit:1.1.5:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.6 | cpe:2.3:a:silcnet:silc_toolkit:1.1.6:*:*:*:*:*:*:* |
| silcnet | silc_toolkit | 1.1.8 | cpe:2.3:a:silcnet:silc_toolkit:1.1.8:*:*:*:*:*:*:* |