CVE-2003-0783

HIGHCVSS v2 · 7.27.2—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.2 — v2 rates that HIGH (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:L/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 1.1% 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
7.2EG
EchelonGraph verdictMitigate this weekExploitation is likely or a public exploit exists.
  • Public exploit code is available (Exploit-DB (verified), public exploit)
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS v2: 7.2Exploit: Exploit-DB (verified) · public exploitExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

Multiple buffer overflows in hztty 2.0 allow local users to gain root privileges.

CVSS v2.0 (legacy)
7.2HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.2HIGHlow confidence
EG Risk
63
EG Risk 63/100CISA SSVC

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
Severity72% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.1%
EPSS %ILE
65th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 6, 2003

Last Modified

June 16, 2026

References (16)

Affected Packages

(1 across 1 ecosystem)
Debian:3.0(1)
PackageVulnerable rangeFixed inDependents
hztty—2.0-5.2woody1—

Data Freshness Timeline

(refreshed 1× in last 7d / 3× 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.

  1. 2026-09-29 02:38 UTCEG score recompute
  2. 2026-09-12 14:54 UTCEPSS rescore
  3. 2026-09-10 09:23 UTCEPSS rescore
  4. 2026-08-30 01:13 UTCEPSS rescore
  5. 2026-07-26 13:23 UTCEG score recompute▲ 7.20
  6. 2026-07-25 14:11 UTCEPSS rescore
  7. 2026-07-24 14:11 UTCEPSS rescore
  8. 2026-07-23 00:45 UTCEG score recompute
  9. 2026-07-23 00:26 UTCEG score recompute
  10. 2026-07-22 23:49 UTCEG score recompute
  11. 2026-07-22 21:30 UTCEG score recompute
  12. 2026-07-20 17:02 UTCEPSS rescore
  13. 2026-07-19 14:25 UTCEPSS rescore
  14. 2026-07-18 09:59 UTCEPSS rescore
  15. 2026-07-18 09:59 UTCEPSS rescore
  16. 2026-07-16 16:58 UTCEPSS rescore
  17. 2026-07-15 01:55 UTCEPSS rescore
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  19. 2026-07-13 06:07 UTCEPSS rescore
  20. 2026-07-11 08:22 UTCEPSS rescore
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  22. 2026-07-08 15:09 UTCEPSS rescore
  23. 2026-07-06 02:19 UTCEPSS rescore
  24. 2026-07-04 06:26 UTCEPSS rescore
  25. 2026-07-02 14:00 UTCEPSS rescore
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  1. 2026-06-29 14:02 UTCEPSS rescore
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  3. 2026-06-28 14:02 UTCEPSS rescore
  4. 2026-06-28 04:52 UTCEPSS rescore
  5. 2026-06-27 03:04 UTCEPSS rescore
  6. 2026-06-23 21:29 UTCEPSS rescore
  7. 2026-06-22 14:22 UTCEPSS rescore
  8. 2026-06-21 14:52 UTCEPSS rescore
  9. 2026-06-21 01:56 UTCEPSS rescore
  10. 2026-06-19 19:22 UTCEPSS rescore
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  12. 2026-06-18 17:49 UTCEPSS rescore
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  14. 2026-06-17 17:49 UTCEPSS rescore
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  16. 2026-06-16 17:49 UTCEPSS rescore
  17. 2026-06-16 17:49 UTCEPSS rescore
  18. 2026-06-15 17:43 UTCEPSS rescore
  19. 2026-06-14 23:13 UTCEPSS rescore
  20. 2026-06-14 23:13 UTCEPSS rescore
  21. 2026-06-13 22:56 UTCEPSS rescore
  22. 2026-06-12 23:08 UTCEPSS rescore
  23. 2026-06-11 13:55 UTCEPSS rescore
  24. 2026-06-10 22:13 UTCEPSS rescore
  25. 2026-06-10 13:17 UTCEPSS rescore
  26. 2026-06-08 14:13 UTCEPSS rescore
  27. 2026-06-07 15:21 UTCEPSS rescore
  28. 2026-06-06 13:44 UTCEPSS rescore
  29. 2026-06-06 13:44 UTCEPSS rescore
  30. 2026-06-06 13:44 UTCEPSS rescore
  31. 2026-06-05 22:43 UTCEPSS rescore
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  33. 2026-06-05 06:07 UTCEPSS rescore
  34. 2026-06-04 13:09 UTCEPSS rescore
  35. 2026-06-02 20:10 UTCEPSS rescore
  36. 2026-06-01 13:49 UTCEPSS rescore
  37. 2026-06-01 13:49 UTCEPSS rescore
  38. 2026-05-31 22:28 UTCEPSS rescore
  39. 2026-05-31 17:15 UTCEG score recompute
  40. 2026-05-31 17:15 UTCGHSA enrichment
  41. 2026-05-31 00:13 UTCEPSS rescore
  42. 2026-05-31 00:13 UTCEPSS rescore
  43. 2026-05-29 13:40 UTCEPSS rescore
  44. 2026-05-29 13:40 UTCEPSS rescore
  45. 2026-05-28 13:42 UTCEPSS rescore
  46. 2026-05-28 13:42 UTCEPSS rescore
  47. 2026-05-28 13:42 UTCEPSS rescore
  48. 2026-05-27 13:37 UTCEPSS rescore
  49. 2026-05-26 13:41 UTCEPSS rescore
  50. 2026-05-26 13:41 UTCEPSS rescore
  51. 2026-05-26 07:16 UTCEPSS rescore
  52. 2026-05-26 07:16 UTCEPSS rescore
  53. 2026-05-24 16:42 UTCEPSS rescore
  54. 2026-05-22 21:15 UTCEPSS rescore
  55. 2026-05-20 22:36 UTCEPSS rescore
  56. 2026-05-20 11:20 UTCEPSS rescore
  57. 2026-05-20 11:20 UTCEPSS rescore
  58. 2026-05-18 21:29 UTCEPSS rescore
  59. 2026-05-18 21:29 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-104✓ verified
    First seen Sep 21, 2003

    hztty 2.0 (RedHat 9.0) - Local Privilege Escalation

    Open source ↗

Related CVEs(same product)

Same product

1 shown

Debian:3.0:hztty

Frequently asked(4)

What is CVE-2003-0783?
CVE-2003-0783 is a high vulnerability published on October 6, 2003. Multiple buffer overflows in hztty 2.0 allow local users to gain root privileges.
When was CVE-2003-0783 disclosed?
CVE-2003-0783 was first published on October 6, 2003, with the most recent update on June 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2003-0783 actively exploited?
CVE-2003-0783 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
How do I remediate CVE-2003-0783?
No fix for CVE-2003-0783 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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