CVE-2007-4993

MEDIUMCVSS v2 · 6.96.9—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.9 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:L/AC:M/Au:N/C:C/I:C/A:C. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 0.6% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
Weaponized
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS v2: 6.9Exploit: Exploit-DB (verified) · public exploitExposed: 0

A fix is available — apply it.

pygrub (tools/pygrub/src/GrubConf.py) in Xen 3.0.3, when booting a guest domain, allows local users with elevated privileges in the guest domain to execute arbitrary commands in domain 0 via a crafted grub.conf file whose contents are used in exec statements.

CVSS v2.0 (legacy)
6.9MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.9(low)
EG Risk
62(Track)
EG Risk 62/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity69% × 45%
Exploitation65% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 27, 2007

Last Modified

April 23, 2026

References (42)

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxen-utils-3.0 (3.0.3-0ubuntu10.1) @ feisty2026-05-31ubuntu
redhatxen-0:3.0.3-25.0.4.el52007-10-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:4.0(1)
PackageVulnerable rangeFixed inDependents
xen-3.03.0.3-0-23.0.3-0-3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 0× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-08-08 16:30 UTCEPSS rescore
  2. 2026-08-07 16:20 UTCEPSS rescore
  3. 2026-08-06 13:41 UTCEPSS rescore
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  8. 2026-07-30 01:25 UTCEPSS rescore
  9. 2026-07-28 15:30 UTCEPSS rescore
  10. 2026-07-26 13:33 UTCEG score recompute▲ 6.90
  11. 2026-07-25 14:12 UTCEPSS rescore
  12. 2026-07-24 14:11 UTCEPSS rescore
  13. 2026-07-23 14:13 UTCEPSS rescore
  14. 2026-07-23 00:54 UTCEG score recompute
  15. 2026-07-23 00:33 UTCEG score recompute
  16. 2026-07-22 23:59 UTCEG score recompute
  17. 2026-07-22 21:38 UTCEG score recompute
  18. 2026-07-22 14:03 UTCEPSS rescore
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  20. 2026-07-20 17:03 UTCEPSS rescore
  21. 2026-07-18 09:59 UTCEPSS rescore
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  1. 2026-07-13 06:07 UTCEPSS rescore
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  5. 2026-07-06 02:19 UTCEPSS rescore
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  7. 2026-07-04 06:27 UTCEPSS rescore
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  9. 2026-07-02 14:00 UTCEPSS rescore
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  12. 2026-06-30 23:19 UTCEPSS rescore
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  18. 2026-06-27 03:04 UTCEPSS rescore
  19. 2026-06-25 13:46 UTCEPSS rescore
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  23. 2026-06-23 21:29 UTCEPSS rescore
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  25. 2026-06-22 14:22 UTCEPSS rescore
  26. 2026-06-21 14:53 UTCEPSS rescore
  27. 2026-06-21 01:56 UTCEPSS rescore
  28. 2026-06-21 01:56 UTCEPSS rescore
  29. 2026-06-19 19:22 UTCEPSS rescore
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  31. 2026-06-18 17:49 UTCEPSS rescore
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  39. 2026-06-13 22:57 UTCEPSS rescore
  40. 2026-06-12 23:08 UTCEPSS rescore
  41. 2026-06-10 22:14 UTCEPSS rescore
  42. 2026-06-10 13:17 UTCEPSS rescore
  43. 2026-06-08 14:13 UTCEPSS rescore
  44. 2026-06-07 15:21 UTCEPSS rescore
  45. 2026-06-06 13:44 UTCEPSS rescore
  46. 2026-06-06 13:44 UTCEPSS rescore
  47. 2026-06-05 22:44 UTCEPSS rescore
  48. 2026-06-05 22:44 UTCEPSS rescore
  49. 2026-06-05 06:07 UTCEPSS rescore
  50. 2026-06-04 13:09 UTCEPSS rescore
  51. 2026-06-04 13:09 UTCEPSS rescore
  52. 2026-06-04 13:09 UTCEPSS rescore
  53. 2026-06-02 20:10 UTCEPSS rescore
  54. 2026-06-02 20:10 UTCEPSS rescore
  55. 2026-06-01 13:49 UTCEPSS rescore
  56. 2026-06-01 13:49 UTCEPSS rescore
  57. 2026-06-01 13:49 UTCEPSS rescore
  58. 2026-05-31 22:28 UTCEPSS rescore
  59. 2026-05-31 22:28 UTCEPSS rescore
  60. 2026-05-31 00:46 UTCEG score recompute
  61. 2026-05-31 00:46 UTCVendor advisory
  62. 2026-05-31 00:46 UTCGHSA enrichment
  63. 2026-05-31 00:13 UTCEPSS rescore
  64. 2026-05-31 00:13 UTCEPSS rescore
  65. 2026-05-29 13:40 UTCEPSS rescore
  66. 2026-05-28 13:42 UTCEPSS rescore
  67. 2026-05-28 13:42 UTCEPSS rescore
  68. 2026-05-28 13:42 UTCEPSS rescore
  69. 2026-05-27 13:38 UTCEPSS rescore
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  72. 2026-05-26 13:41 UTCEPSS rescore
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  74. 2026-05-26 07:16 UTCEPSS rescore
  75. 2026-05-26 07:16 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-30620✓ verified
    First seen Sep 22, 2007

    Xen 3.0.3 - pygrub TOOLS/PYGRUB/SRC/GRUBCONF.PY Local Command Injection

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2007-4993?
CVE-2007-4993 is a medium vulnerability published on September 27, 2007. pygrub (tools/pygrub/src/GrubConf.py) in Xen 3.0.3, when booting a guest domain, allows local users with elevated privileges in the guest domain to execute arbitrary commands in domain 0 via a crafted grub.conf file whose contents are used in exec statements.
When was CVE-2007-4993 disclosed?
CVE-2007-4993 was first published in the National Vulnerability Database on September 27, 2007, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2007-4993 actively exploited?
CVE-2007-4993 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.3% of all scored CVEs.
How do I remediate CVE-2007-4993?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2007-4993, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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