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CVE-1999-0502· NVD / CVE Program· CNA mitre

A Unix account has a default, null, blank, or missing password.

HighCVSS 7.5 · v2.0—Weaponized No fix recorded
Published
Mar 1, 1998
Updated
Jun 16, 2026
EPSS
53.3% · 99th percentile
CWE
—
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Action score

46

Plan

Add it to your regular patch cycle.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
16 / 30 · 53.3%

Affected systems

VendorProduct
hphp-ux
redhatlinux
sunsolaris
sunsunos

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • hp hp-ux10.20
  • hp hp-ux11
  • redhat linux6.0
  • sun solaris2.6
  • sun sunos5.5.1
  • sun sunos5.7
  • sun sunos5.8

Same product

hp: all records

Other highest-scoring records for the same primary product.

  • CVE-2000-0573The lreply function in wu-ftpd 2.6.0 and earlier does not properly cleanse an untrusted format string, which allows remote attackers to exec
    69This week
  • CVE-2005-3277The LPD service in HP-UX 10.20 11.11 (11i) and earlier allows remote attackers to execute arbitrary code via shell metacharacters ("`" or si
    46Plan
  • CVE-2001-0249Heap overflow in FTP daemon in Solaris 8 allows remote attackers to execute arbitrary commands by creating a long pathname and calling the L
    45Plan
  • CVE-2007-6195Buffer overflow in the sw_rpc_agent_init function in swagentd in Software Distributor (SD), and possibly other DCE applications, in HP HP-UX
    44Plan
  • CVE-2004-0716Buffer overflow in the DCE daemon (DCED) for the DCE endpoint mapper (epmap) on HP-UX 11 allows remote attackers to execute arbitrary code v
    44Plan
  • CVE-2000-0699Format string vulnerability in ftpd in HP-UX 10.20 allows remote attackers to cause a denial of service or execute arbitrary commands via fo
    44Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×25
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote1999-01-01
Metasploit moduleauxiliary/scanner/db2/db2_authDB2 Authentication Brute Force Utilityauxiliary—
Metasploit moduleauxiliary/scanner/ftp/ftp_loginFTP Authentication Scannerauxiliary—
Metasploit moduleauxiliary/scanner/http/dell_idracDell iDRAC Default Loginauxiliary—
Metasploit moduleauxiliary/scanner/http/dlink_dir_300_615_http_loginD-Link DIR-300A / DIR-320 / DIR-615D HTTP Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/dlink_dir_615h_http_loginD-Link DIR-615H HTTP Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/dlink_dir_session_cgi_http_loginD-Link DIR-300B / DIR-600B / DIR-815 / DIR-645 HTTP Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/http_loginHTTP Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/joomla_bruteforce_loginJoomla Bruteforce Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/tomcat_mgr_loginTomcat Application Manager Login Utilityauxiliary—
Metasploit moduleauxiliary/scanner/http/wordpress_xmlrpc_loginWordpress XML-RPC Username/Password Login Scannerauxiliary—
Metasploit moduleauxiliary/scanner/mysql/mysql_loginMySQL Login Utilityauxiliary—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+306 d
  3. Metasploit+306 d
  4. TodaySep 30, 2026+10440 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

—

CVSS vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records