vciy

CVE-1999-0005

INDEX BUILT · 2026-09-20

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Arbitrary command execution via IMAP buffer overflow in authenticate command.

CVE-1999-00053 of 4 sources documented this
35

rank 35 = 5 + 25 + 1 + 4 + 0

rank@v1 · scheduled

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.18415  ·  without this subject the record ranks 30

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 10.0, from NVD  ·  without this subject the record ranks 10

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

rose on 2025-09-23  ·  without this subject the record ranks 34

How much of the world it touches

NVD CPE configurations

2 products in the CPE ranges  ·  without this subject the record ranks 31

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 35

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$919,000over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$919,000 = $4.99M incident cost x 1 exposure x 0.18415 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.18415EPSSNOT IN KEVas of 2026-09-20
Severity10 CRITICALreceipt
Harmtotal loss · unauthenticatedreceipt
Exploitationnone in held sources
Defenseno fix version held
Movementrisenreceipt
PLATEAU10Minimal movement since 2025-04-27, 463 days at 0.18, as of 2026-08-03. arc-rules@v1

Foresight · where to check next

No weakness class or product neighbourhood is held for this record, so this index cannot name anywhere to check next. That is an absence in the record, not a finding about the software.

Color is a claim, not decoration:the hostile worldthe defenseno signal

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · no authentication · low attack complexityreceipt
ImpactComplete confidentiality, integrity and availability lossreceipt
Scored fromCVSS v2.0 · NVD's vectorreceipt
Weakness classNo CWE mapping in held sources.

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed inNo fix version in held sources, as the index stood on 3 Aug 2026.
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, NVD10 CRITICALreceipt
Exploit probability0.18415 · top 3% of all CVEsreceipt
Blast breadth2 products across 2 vendorsderived
Assigned bymitrereceipt
Recorded changes15 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Named in the CPE rangesNetscape messaging server; University of washington imapreceipt
Published rangesnetscape messaging server 3.55; university of washington imap 10.234receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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What it is stated by the CNA

Arbitrary command execution via IMAP buffer overflow in authenticate command. receipt

NVD's analysis a second authority

severity
10 AV:N/AC:L/Au:N/C:C/I:C/A:C
affected versions
netscape messaging server 3.55; university of washington imap 10.234

check it yourself securityfocus.com sunsolve.sun.com receipt

Dated events

2023-03-07EPSS moved 0.04 to 0.942026-06-15EPSS moved 0.13 to 0.19

Movement the material steps

4 Feb 20220.042659999999999997
7 Mar 20230.9404 · crossed 0.10 and 0.50 and 0.90 · scoring model v2023.03.01
17 Mar 20250.31026 · crossed 0.50 and 0.90 · scoring model v2025.03.14
27 Apr 20250.17478
15 Jun 20260.19239 · scoring model v2026.06.15
3 Aug 20260.18415
Show all 15 observations
4 Feb 20220.042659999999999997
7 Mar 20230.9404
8 Mar 20230.94040
8 Feb 20240.91963
17 Mar 20250.31026
29 Mar 20250.40988
30 Mar 20250.31026
27 Apr 20250.17478
23 Sep 20250.25334
15 Oct 20250.13652
9 Feb 20260.13041
13 Feb 20260.1263
15 Jun 20260.19239
21 Jun 20260.18272
3 Aug 20260.18415

15 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.18415Published1999-09-29Index as of2026-08-03

The record had been public for 26 years, 10 months when this index was last written.

Published 1999-09-29 receipt · Index as of 2026-08-03 derived

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What usually comes next

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