CVE-2021-21702
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.15% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- php/php · debian/debian linux · netapp/clustered data ontap · oracle/communications diameter signaling router
- Source
- security@php.net
EPSS 3.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.php.net/bug.php?id=80672Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202105-23Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210312-0005/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4856Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
- https://bugs.php.net/bug.php?id=80672Issue Tracking, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202105-23Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210312-0005/Third Party Advisory
- https://www.debian.org/security/2021/dsa-4856Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.