Format string vulnerability in the inc_put_error function in src/inc.c in Sylpheed 2.4.4, and Sylpheed-Claws (Claws Mail) 1.9.100 and 2.10.0, allows remote POP3 servers to execute arbitrary code via format string specifiers in crafted replies.
Conclusion & alert: CVE-2007-2958 is rated Moderate Risk (58.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.52%). 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 | 2026-04-15 | 4.35% | 4.52% | +0.17% |
| 2 | 2025-08-03 | 3.92% | 4.35% | +0.43% |
| 3 | 2025-07-26 | — | 3.92% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2007-2958 low priority: Debian including 1 source packages (sylpheed), 3 status rows across 3 suites (bookworm, bullseye, trixie): resolved 3. | https://security-tracker.debian.org/tracker/CVE-2007-2958 |
gentoo
|
normal | CVE-2007-2958: 1 GLSA(s) (200710-29), 2 atom(s) (mail-client/claws-mail, mail-client/sylpheed); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-2958 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2007-2958 |
ubuntu
|
medium | CVE-2007-2958 medium priority: Ubuntu including 4 source packages (claws-mail, sylpheed, sylpheed-claws, sylpheed-claws-gtk2), 20 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 11, DNE 5, needs-triage 4. | https://ubuntu.com/security/CVE-2007-2958 |
Not vulnerable. This issue did not affect version of Sylpheed as shipped with Red Hat Enterprise Linux 2.1. Sylpheed and claws-mail are not shipped with Red Hat Enterprise Linux 3, 4, or 5.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| sylpheed | sylpheed | 2.4.4 | cpe:2.3:a:sylpheed:sylpheed:2.4.4:*:*:*:*:*:*:* |
| sylpheed-claws | sylpheed-claws | 1.9.100 | cpe:2.3:a:sylpheed-claws:sylpheed-claws:1.9.100:*:*:*:*:*:*:* |
| sylpheed-claws | sylpheed-claws | 2.10.0 | cpe:2.3:a:sylpheed-claws:sylpheed-claws:2.10.0:*:*:*:*:*:*:* |