CVE-2021-20576 Denial of service in Security Verify Access
A remote attacker can crash the IBM Security Verify Access application by sending a specially crafted HTTP GET request.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20576?
CVE-2021-20576 is a high-severity denial of service vulnerability in Ibm Security Verify Access, published on 31 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IBM Security Verify Access 20.07 could allow a remote attacker to send a specially crafted HTTP GET request that could cause the application to crash.
Which versions are affected by CVE-2021-20576?
It affects 2 products.
Products include Ibm Application Gateway, Ibm Security Verify Access.
How do I fix CVE-2021-20576?
No fix has been published for CVE-2021-20576 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-20576 being exploited?
There is no known exploitation of CVE-2021-20576 in the wild and no public exploit code.
Other vulnerabilities in Ibm Security Verify Access
- CVE-2024-28787 IBM Security Verify Access information disclosure
- CVE-2024-45655 IBM Application Gateway incorrect permission assignment
- CVE-2025-36396 Security vulnerabilities have been found in IBM Application Gateway
- CVE-2025-36397 Security vulnerabilities have been found in IBM Application Gateway
- CVE-2022-22387 Cross-site scripting in Application Gateway
Sources
Also known as GHSA-8pr6-wcxr-5g9c.