SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2002-0079

Buffer overflow in the chunked encoding transfer mechanism in Internet Information Server (IIS) 4.0 and 5.0 Active Server Pages allows attackers to cause a denial of service or execute arbitrary code.

EXPLOIT ×4 ✓HIGH 7.5EPSS 78.0%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 78.0%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

Buffer overflow in the chunked encoding transfer mechanism in Internet Information Server (IIS) 4.0 and 5.0 Active Server Pages allows attackers to cause a denial of service or execute arbitrary code.

CVSS 2.0
7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
77.96% probability · 100th percentile
Public exploits
4 in Exploit-DB · verified · first 10 April 2002
CISA KEV
Not listed
Affected
microsoft/internet information server · microsoft/internet information services
Source
cve@mitre.org
EPSS trend
0%40%80%26 October 2026: 77.96%26 October 202626 October 2026

EPSS 78.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (4)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-21371source ↗Microsoft IIS 4.0/5.0 - Chunked Encoding Transfer Heap Overflow (4)windows · yuangeremote24 April 2002yes
EDB-21369source ↗Microsoft IIS 4.0/5.0 - Chunked Encoding Transfer Heap Overflow (2)windows · hsjremote14 April 2002yes
EDB-21370source ↗Microsoft IIS 4.0/5.0 - Chunked Encoding Transfer Heap Overflow (3)windows · NeMeS||yremote10 April 2002yes
EDB-21368source ↗Microsoft IIS 4.0/5.0 - Chunked Encoding Transfer Heap Overflow (1)windows · CHINANSL Security Teamremote10 April 2002yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.