CVE-2021-46825

Name: CVE-2021-46825
Creator: NVD / NIST
Published: 2022-07-07T16:15:09.017+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 1.37%

Last modified Jun 17, 2026

CVE-2021-46825 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Symantec Advanced Secure Gateway (ASG) and ProxySG are susceptible to an HTTP desync vulnerability. When a remote unauthenticated attacker and other web clients communicate through the proxy with the same web server, the attacker can send crafted HTTP requests and cause the proxy to forward web server responses to unintended clients. EPSS estimates a 1.37% chance of exploitation in the next 30 days.

Description

Symantec Advanced Secure Gateway (ASG) and ProxySG are susceptible to an HTTP desync vulnerability. When a remote unauthenticated attacker and other web clients communicate through the proxy with the same web server, the attacker can send crafted HTTP requests and cause the proxy to forward web server responses to unintended clients. Severity/CVSSv3: High / 8.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

1.37%

68.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Broadcom	Advanced Secure Gateway	6.7
Broadcom	Advanced Secure Gateway	7.3
Broadcom	Proxysg	6.7
Broadcom	Proxysg	7.3

References

Timeline

Published: Jul 7, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-46825?

How severe is CVE-2021-46825?

CVE-2021-46825 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 1.37% probability of exploitation in the next 30 days.

How do I fix CVE-2021-46825?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-46825?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST