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Vulnerabilities

Vulnerability · CVE-2001-0498

Transparent Network Substrate (TNS) over Net8 (SQLNet) in Oracle 8i 8.1.7 and earlier allows remote attackers to cause a denial of service via a malformed SQLNet conne…

Published Jul 21, 2001 · catalog updated Jun 16, 2026 · Oracle

Check if you run it

No confirmed exploitation is on record for CVE-2001-0498. EPSS is 2.10%. Act only if a listed version of Oracle is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.10%
Remediation
Version ranges on file
Affected products
cpe oracle/oracle8i · stated oracle8i

Transparent Network Substrate (TNS) over Net8 (SQLNet) in Oracle 8i 8.1.7 and earlier allows remote attackers to cause a denial of service via a malformed SQLNet connection request with a large offset in the header extension.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe oracle/oracle8iversion unspecified
  • stated oracle8i<= 8.1.7

How to fix CVE-2001-0498

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2001-0498. EPSS is 2.10%. Act only if a listed version of Oracle is installed.

Which versions are affected?

Compare what you have installed with <= 8.1.7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 2.10%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 21, 2001 · Oracle Critical Patch Updates

    Detected

    Transparent Network Substrate (TNS) over Net8 (SQLNet) in Oracle 8i 8.1.7 and earlier allows remote attackers to cause a denial of service via a malformed SQLNet connection request with a large offset in the header extension.

  2. Jun 16, 2026 · Oracle Critical Patch Updates

    Updated

    Transparent Network Substrate (TNS) over Net8 (SQLNet) in Oracle 8i 8.1.7 and earlier allows remote attackers to cause a denial of service via a malformed SQLNet connection request with a large offset in the header extension.

Sources

  • CVE.orgVulnerability recordCVE-2001-0498

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2001-0498

    30-day exploitation probability 2.1%

    first.org
  • Oracle Critical Patch UpdatesVendor advisoryCVE-2001-0498

    Transparent Network Substrate (TNS) over Net8 (SQLNet) in Oracle 8i 8.1.7 and earlier allows remote attackers to cause a denial of service via a malformed SQLNet connection request with a large offset in the header extension.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.