CVE-2006-2223

MEDIUMCVSS v2 · 5.05.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — 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:N/AC:L/Au:N/C:P/I:N/A:N. 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 11.3% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Triggered by: NVD CVSS v2.0 (legacy fallback)
Sources: epss, nvd_v2
Weaponized
5.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Public exploit code is available (Exploit-DB, marked verified by Exploit-DB)
CISA-KEV: Not listedEPSS PROB: 11%CVSS v2: 5.0Exploit: Exploit-DB (verified)Exposed services: Not assessed

A fix is available — apply it.

RIPd in Quagga 0.98 and 0.99 before 20060503 does not properly implement configurations that (1) disable RIPv1 or (2) require plaintext or MD5 authentication, which allows remote attackers to obtain sensitive information (routing state) via REQUEST packets such as SEND UPDATE.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0MEDIUMlow confidence
EG Risk
53
EG Risk 53/100

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)
Severity50% × 45%
The EG Score, 5.0 of 10.
Exploitation65% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.
Automatability30% × 15%
EchelonGraph's default before algorithm v3.4: CISA had not published Automatable for this CVE.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
11%
EPSS %ILE
95th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track or Track* at medium and Track* or Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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

May 5, 2006

Last Modified

April 16, 2026

References (23)

15 of 23 shown · show the other 8

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuquagga () @ hoary2026-05-31ubuntu
redhatquagga-0:0.98.3-2.4E2006-06-01redhat
redhatpatch2006-06-01redhat
debian:10quagga @ 0.99.3-2 (fixes >=0)—osv

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:3.1(1)
PackageVulnerable rangeFix by version rangeDependents
quagga0.98.3-7, 0.98.3-7.1
  • every version up to 0.98.3-7.2: fixed in 0.98.3-7.2
—

Weakness Classification(1)

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

All Vendor Advisories

(3)

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 8× in last 7d / 15× 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.

Showing the most recent 81 of 92 refreshes on record for this CVE.

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. 19 repeat rows among the latest 100 are merged into the row they repeat. The 11 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 13:37 UTCEPSS rescoreEPSS 11% · 95th percentile
  2. 2026-10-10 19:53 UTCEPSS rescoreEPSS 11% · 95th percentile
  3. 2026-10-09 19:59 UTCEPSS rescoreEPSS 11% · 95th percentile
  4. 2026-10-08 16:32 UTCEPSS rescoreEPSS 11% · 95th percentile
  5. 2026-10-07 23:36 UTCEPSS rescoreEPSS 11% · 95th percentile
  6. 2026-10-06 15:08 UTCEPSS rescoreEPSS 11% · 95th percentile
  7. 2026-10-05 17:37 UTCEPSS rescoreEPSS 11% · 95th percentile
  8. 2026-10-05 06:48 UTCOSV refresh
  9. 2026-10-03 14:19 UTCEPSS rescoreEPSS 11% · 95th percentile
  10. 2026-09-29 02:59 UTCEG score recompute
  11. 2026-09-18 19:20 UTCEPSS rescoreEPSS 11% · 95th percentile
  12. 2026-09-17 19:20 UTCEPSS rescoreEPSS 11% · 95th percentile
  13. 2026-09-15 14:54 UTCOSV refresh
  14. 2026-09-13 16:39 UTCEPSS rescoreEPSS 11% · 95th percentile
  15. 2026-09-12 14:54 UTCEPSS rescoreEPSS 11% · 95th percentile
  16. 2026-09-10 09:23 UTCEPSS rescoreEPSS 11% · 95th percentile
  17. 2026-09-05 15:21 UTCEPSS rescoreEPSS 11% · 95th percentile
  18. 2026-09-04 04:59 UTCEPSS rescoreEPSS 11% · 95th percentile
  19. 2026-08-30 01:14 UTCEPSS rescoreEPSS 11% · 95th percentile
  20. 2026-08-27 14:04 UTCOSV refresh
  21. 2026-08-11 03:31 UTCOSV refresh
  22. 2026-08-08 16:30 UTCEPSS rescoreEPSS 11% · 95th percentile
  23. 2026-08-05 19:11 UTCEPSS rescoreEPSS 11% · 95th percentile
  24. 2026-08-04 15:03 UTCEPSS rescoreEPSS 11% · 95th percentile
  25. 2026-07-26 13:29 UTCEG score recompute▲ 5.00
Show 56 more
  1. 2026-07-26 04:12 UTCOSV refresh
  2. 2026-07-24 14:11 UTCEPSS rescoreEPSS 11% · 95th percentile
  3. 2026-07-23 00:50 UTCEG score recompute
  4. 2026-07-23 00:30 UTCEG score recompute
  5. 2026-07-22 23:54 UTCEG score recompute
  6. 2026-07-22 21:34 UTCEG score recompute
  7. 2026-07-20 17:02 UTCEPSS rescoreEPSS 11% · 95th percentile
  8. 2026-07-18 09:59 UTCEPSS rescoreEPSS 11% · 95th percentile
  9. 2026-07-16 16:58 UTCEPSS rescoreEPSS 11% · 95th percentile
  10. 2026-07-15 16:53 UTCEPSS rescoreEPSS 11% · 95th percentile
  11. 2026-07-15 01:55 UTCEPSS rescoreEPSS 11% · 95th percentile
  12. 2026-07-13 22:25 UTCEPSS rescoreEPSS 11% · 95th percentile
  13. 2026-07-13 06:07 UTCEPSS rescoreEPSS 11% · 95th percentile
  14. 2026-07-11 08:22 UTCEPSS rescoreEPSS 11% · 95th percentile
  15. 2026-07-09 19:03 UTCEPSS rescoreEPSS 11% · 95th percentile
  16. 2026-07-08 22:39 UTCOSV refresh
  17. 2026-07-08 15:09 UTCEPSS rescoreEPSS 11% · 95th percentile
  18. 2026-07-06 02:19 UTCEPSS rescoreEPSS 11% · 95th percentile
  19. 2026-07-04 06:26 UTCEPSS rescoreEPSS 11% · 95th percentile
  20. 2026-07-02 14:00 UTCEPSS rescoreEPSS 11% · 95th percentile
  21. 2026-07-01 15:01 UTCEPSS rescoreEPSS 11% · 95th percentile
  22. 2026-06-29 14:02 UTCEPSS rescoreEPSS 11% · 95th percentile
  23. 2026-06-27 03:04 UTCEPSS rescoreEPSS 11% · 95th percentile
  24. 2026-06-25 13:46 UTCEPSS rescoreEPSS 11% · 95th percentile
  25. 2026-06-24 14:01 UTCEPSS rescoreEPSS 11% · 95th percentile
  26. 2026-06-23 21:29 UTCEPSS rescoreEPSS 11% · 95th percentile
  27. 2026-06-22 14:22 UTCEPSS rescoreEPSS 11% · 95th percentile
  28. 2026-06-21 01:56 UTCEPSS rescoreEPSS 11% · 95th percentile
  29. 2026-06-20 10:42 UTCOSV refresh
  30. 2026-06-19 19:22 UTCEPSS rescoreEPSS 11% · 95th percentile
  31. 2026-06-18 17:49 UTCEPSS rescoreEPSS 11% · 95th percentile
  32. 2026-06-17 17:49 UTCEPSS rescoreEPSS 11% · 95th percentile
  33. 2026-06-16 17:49 UTCEPSS rescoreEPSS 11% · 95th percentile
  34. 2026-06-15 17:44 UTCEPSS rescoreEPSS 11% · 95th percentile
  35. 2026-06-14 23:13 UTCEPSS rescoreEPSS 13% · 94th percentile
  36. 2026-06-13 22:56 UTCEPSS rescoreEPSS 13% · 94th percentile
  37. 2026-06-12 23:08 UTCEPSS rescoreEPSS 13% · 94th percentile
  38. 2026-06-11 13:55 UTCEPSS rescoreEPSS 13% · 94th percentile
  39. 2026-06-10 22:14 UTCEPSS rescoreEPSS 13% · 94th percentile
  40. 2026-06-10 13:17 UTCEPSS rescoreEPSS 13% · 94th percentile
  41. 2026-06-07 15:21 UTCEPSS rescoreEPSS 13% · 94th percentile
  42. 2026-06-06 13:44 UTCEPSS rescoreEPSS 13% · 94th percentile
  43. 2026-06-05 22:43 UTCEPSS rescoreEPSS 13% · 94th percentile
  44. 2026-06-04 13:09 UTCEPSS rescoreEPSS 13% · 94th percentile
  45. 2026-06-02 20:10 UTCEPSS rescoreEPSS 13% · 94th percentile
  46. 2026-06-01 13:49 UTCEPSS rescoreEPSS 13% · 94th percentile
  47. 2026-05-31 22:28 UTCEPSS rescoreEPSS 13% · 94th percentile
  48. 2026-05-31 08:47 UTCEG score recompute
  49. 2026-05-31 08:47 UTCVendor advisory
  50. 2026-05-31 08:47 UTCGHSA enrichmentGHSA-xx8x-qm77-m9x3
  51. 2026-05-31 00:13 UTCEPSS rescoreEPSS 13% · 94th percentile
  52. 2026-05-29 13:40 UTCEPSS rescoreEPSS 13% · 94th percentile
  53. 2026-05-29 12:31 UTCOSV refresh
  54. 2026-05-28 13:42 UTCEPSS rescoreEPSS 13% · 94th percentile
  55. 2026-05-27 13:37 UTCEPSS rescoreEPSS 13% · 94th percentile
  56. 2026-05-26 13:41 UTCEPSS rescoreEPSS 13% · 94th percentile

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 Exploit-DB entry). Defenders should treat patch urgency accordingly.

  • Exploit-DBEDB-27801✓ verified
    Published May 3, 2006

    Quagga Routing Software Suite 0.9x - RIPd RIPv1 Request Routing Table Disclosure

    Open source ↗

Related CVEs(same product + same vendor + same CWE)

Same vendor

2 shown

redhat:RHSA-2006:0525

Frequently asked(4)

What is CVE-2006-2223?
CVE-2006-2223 is a medium-severity vulnerability; its CVE record was published on May 5, 2006. RIPd in Quagga 0.98 and 0.99 before 20060503 does not properly implement configurations that (1) disable RIPv1 or (2) require plaintext or MD5 authentication, which allows remote attackers to obtain sensitive information (routing state) via REQUEST packets such as SEND UPDATE.
When was CVE-2006-2223 made public?
CVE-2006-2223 was made public on May 3, 2006: that is the date its CVE record's CNA, MITRE Corporation, gives for when the vulnerability was made public. The CVE record itself was published on May 5, 2006. EchelonGraph's copy of the record carries a last-modified date of April 16, 2026; the record at its source may have been updated since.
Is CVE-2006-2223 actively exploited?
CVE-2006-2223 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: Exploit-DB marks a public exploit for it as verified. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 11% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
How do I remediate CVE-2006-2223?
A fix for CVE-2006-2223 is available: update to the fixed version the vendor names in its advisory.

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