7.5

CVE-2000-0258: microsoft internet_information_server Improper Input Validation

CVSS: 7.5v3.0HighModified
Published 02-06-2000Last modified 08-08-2024
Open JSON

Vulnerability summary

CVE-2000-0258 is a high (CVSS 7.5) Improper Input Validation vulnerability in microsoft internet_information_server. EPSS estimates a 19.46% chance of exploitation in the next 30 days, higher than 97.3% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
19.46%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 02-06-2000
    PublishedVulnerability first disclosed.
  2. 08-08-2024
    Last modifiedVulnerability information updated.

Description

IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the "Myriad Escaped Characters" Vulnerability.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

19.46%

Chance of exploitation in the next 30 days

Percentile

97%

Versus all other CVEs

30-day change

0.00 pp

From 19.46% on 20-09-2026

20-09-202620-10-2026
EPSS score
19.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft2 products

1 vendor · 2 products

References

2 links