CVE-2001-1533
5.3 · MEDIUMOverview
CVE-2001-1533 is a medium-severity vulnerability affecting microsoft isa_server. It was published on December 31, 2001 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to cause a denial of service via a flood of fragmented UDP packets. NOTE: the vendor disputes this issue, saying that it requires high bandwidth to exploit, and the server does not experience any instability. Therefore this "laws of physics" issue might not be included in CVE
Remediation
Check the references section for vendor advisories and patches from microsoft. Update isa_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|
References
Frequently Asked Questions
What is CVE-2001-1533?
CVE-2001-1533 is a medium-severity vulnerability affecting microsoft isa_server. It was published on December 31, 2001 and has a CVSS 3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2001-1533?
This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2001-1533?
Check the references section for vendor advisories and patches from microsoft. Update isa_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2001-1533?
CyberStrike's AI-powered security agents can automatically detect CVE-2001-1533 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related MEDIUM CVEs from 2001
View all →Joe text editor follows symbolic links when creating a rescue copy called DEADJOE during an abnormal
Off-by-one vulnerability in CPIA driver of Linux kernel before 2.2.19 allows users to modify kernel
ZoneAlarm and ZoneAlarm Pro allows a local attacker to cause a denial of service by running a trojan
qpopper POP server creates lock files with predictable names, which allows local users to cause a de
script command in the util-linux package before 2.11n allows local users to overwrite arbitrary file
The uipc system calls (uipc_syscalls.c) in OpenBSD 2.9 and 3.0 provide user mode return instead of v