CVE-2021-21702

Null Dereference in SoapClient

Description

In PHP versions 7.3.x below 7.3.27, 7.4.x below 7.4.15 and 8.0.x below 8.0.2, when using SOAP extension to connect to a SOAP server, a malicious SOAP server could return malformed XML data as a response that would cause PHP to access a null pointer and thus cause a crash.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.16%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory php.net
Affected: PHP Group PHP
Published at:
Updated at:

References

Link Tags
https://bugs.php.net/bug.php?id=80672 vendor advisory issue tracking
https://www.debian.org/security/2021/dsa-4856 third party advisory vendor advisory
https://security.gentoo.org/glsa/202105-23 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00008.html third party advisory mailing list
https://www.oracle.com/security-alerts/cpuoct2021.html third party advisory patch
https://www.tenable.com/security/tns-2021-14 third party advisory
https://security.netapp.com/advisory/ntap-20210312-0005/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-21702?
CVE-2021-21702 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21702?
To fix CVE-2021-21702, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21702 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21702 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21702?
CVE-2021-21702 affects PHP Group PHP.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.