Buffer overflow in the ReadImage function in generic/tkImgGIF.c in Tcl (Tcl/Tk) 8.4.13 through 8.4.15 allows remote attackers to execute arbitrary code via multi-frame interlaced GIF files in which later frames are smaller than the first. NOTE: this issue is due to an incorrect patch for CVE-2007-5378.
Conclusion & alert: CVE-2007-5137 is rated Moderate Risk (59.7/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.00%, 92th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 2026-05-17 | 7.71% | 8.00% | +0.29% |
| 2 | 2025-12-13 | 7.27% | 7.71% | +0.45% |
| 3 | 2025-11-26 | — | 7.27% | — |
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
|
not yet assigned | CVE-2007-5137 not yet assigned priority: Debian including 1 source packages (libtk-img), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2007-5137 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2007-5137 |
ubuntu
|
medium | CVE-2007-5137 medium priority: Ubuntu including 3 source packages (libtk-img, tk8.3, tk8.4), 35 status rows across 13 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 21, released 10, ignored 3, DNE 1. | https://ubuntu.com/security/CVE-2007-5137 |
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2007-5137 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw.