CVE-1999-0022

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2022-04-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
7.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.8Exploit: None knownExposed services: Not assessed

No fix has been recorded since the CVE record was published in 1996 — isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

Local user gains root privileges via buffer overflow in rdist, via expstr() function.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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 (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix has been recorded since the CVE record was published in 1996. Isolate the affected system within your standard update timelines (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix has been recorded since the CVE record was published in 1996. Isolate the affected system within your standard update timelines (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

Published

July 3, 1996

Last Modified

June 16, 2026

References (1)

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 9× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 10 repeat rows among the latest 73 are merged into the row they repeat.

  1. 2026-10-11 13:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-10-10 19:53 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-09 19:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-08 16:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-10-07 23:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-10-06 15:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-10-05 17:36 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-04 23:14 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-09-29 02:27 UTCEG score recompute
  10. 2026-09-04 04:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-08-03 10:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-07-23 00:40 UTCEG score recompute
  13. 2026-07-23 00:22 UTCEG score recompute
  14. 2026-07-22 23:45 UTCEG score recompute
  15. 2026-07-22 21:24 UTCEG score recompute
  16. 2026-07-20 17:02 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-07-18 09:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-07-16 16:58 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-07-15 16:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-07-15 01:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-07-13 06:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  22. 2026-07-11 08:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-07-08 15:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-07-04 06:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  25. 2026-07-02 14:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
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  1. 2026-06-29 14:02 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-06-28 14:02 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-06-27 03:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-06-24 14:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-06-23 21:29 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-06-22 14:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-06-21 01:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  8. 2026-06-19 19:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-06-18 17:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-06-17 17:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-06-16 17:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-06-14 23:13 UTCEPSS rescoreEPSS 0.3% · 48th percentile
  13. 2026-06-13 22:56 UTCEPSS rescoreEPSS 0.3% · 48th percentile
  14. 2026-06-12 23:07 UTCEPSS rescoreEPSS 0.3% · 48th percentile
  15. 2026-06-11 13:55 UTCEPSS rescoreEPSS 0.3% · 48th percentile
  16. 2026-06-10 22:13 UTCEPSS rescoreEPSS 0.3% · 48th percentile
  17. 2026-06-10 13:17 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  18. 2026-06-08 14:13 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  19. 2026-06-07 15:21 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  20. 2026-06-06 13:44 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  21. 2026-06-05 06:07 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  22. 2026-06-04 13:09 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  23. 2026-06-02 20:10 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  24. 2026-06-01 13:48 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  25. 2026-05-31 23:11 UTCEG score recompute
  26. 2026-05-31 23:11 UTCGHSA enrichmentGHSA-r96j-7gxg-wp39 · GitHub severity HIGH · GitHub CVSS 7.8
  27. 2026-05-31 22:27 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  28. 2026-05-29 13:40 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  29. 2026-05-28 13:42 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  30. 2026-05-27 13:37 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  31. 2026-05-26 13:41 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  32. 2026-05-26 07:16 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  33. 2026-05-24 16:42 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  34. 2026-05-22 21:15 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  35. 2026-05-21 22:38 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  36. 2026-05-20 22:36 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  37. 2026-05-20 11:20 UTCEPSS rescoreEPSS 0.2% · 40th percentile
  38. 2026-05-18 21:29 UTCEPSS rescoreEPSS 0.2% · 40th percentile

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-1999-0022?
CVE-1999-0022 is a high-severity vulnerability; its CVE record was published on July 3, 1996. Local user gains root privileges via buffer overflow in rdist, via expstr() function.
When was the CVE record for CVE-1999-0022 published?
The CVE record for CVE-1999-0022 was published on July 3, 1996. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 16, 2026; the record at its source may have been updated since.
Is CVE-1999-0022 actively exploited?
CVE-1999-0022 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-1999-0022?
CVE-1999-0022 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-1999-0022?
No fix for CVE-1999-0022 has been recorded since its CVE record was published in 1996, and neither the vendor feeds EchelonGraph reads nor the CVE record's references hold the vendor's own advisory. Isolate the affected system (restrict network access to it, for example with a firewall, or keep it off the internet) or retire the product.

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