CVE-2006-1520

Format string vulnerability in ANSI C Sender Policy Framework library (libspf) before 1.0.0-p5, when debugging is enabled, allows remote attackers to execute arbitrary code via format string specifiers, possibly in an e-mail address.

Published: 2006-05-22 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-1520 is rated Moderate Risk (55.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.50%). EPSS rose +1.28% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2006-1520

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 1.22% 2.50% +1.28%
2 2025-03-30 1.95% 1.22% -0.73%
3 2025-03-29 — 1.95% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-1520

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2006-1520

OS Trackers for CVE-2006-1520

vendor priority summary link
ubuntu medium CVE-2006-1520 medium priority: Ubuntu including 1 source packages (libspf), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2006-1520

Affected software / configurations for CVE-2006-1520

Vendor Product Version Raw CPE
libspf libspf 1.0.0_p4 cpe:2.3:a:libspf:libspf:1.0.0_p4:*:*:*:*:*:*:*

References for CVE-2006-1520

cvelogic Threat Intelligence