What is the CVSS score of EUVD-2025-21276?

EUVD-2025-21276 has a CVSS 3.1 base score of 5.9 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Which versions of PHP are affected by EUVD-2025-21276?

Organizations using PHP should be aware of moderate risk from CVE-2025-6491, a null pointer dereference vulnerability rated CVSS 5.9.. A patch is available.

Is there a public PoC exploit available for EUVD-2025-21276?

Yes, a public proof-of-concept exploit is available for EUVD-2025-21276. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate EUVD-2025-21276?

Within 30 days: Identify affected systems running PHP and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

PHP EUVD-2025-21276

| CVE-2025-6491 MEDIUM

NULL Pointer Dereference (CWE-476)

2025-07-13 security@php.net

PHP Null Pointer Dereference Denial Of Service Debian Red Hat Suse

5.9

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

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

SUSE

MEDIUM

qualitative

Red Hat

5.9 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

EUVD ID Assigned

Mar 16, 2026 - 09:18 euvd

EUVD-2025-21276

Analysis Generated

Mar 16, 2026 - 09:18 vuln.today

PoC Detected

Nov 04, 2025 - 22:16 vuln.today

Public exploit code

CVE Published

Jul 13, 2025 - 22:15 nvd

MEDIUM 5.9

DescriptionCVE.org

In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.

Analysis

Technical ContextAI

A NULL pointer dereference occurs when the application attempts to use a pointer that has not been initialized or has been set to NULL.

RemediationAI

Add NULL checks before pointer dereference operations. Use static analysis to identify potential NULL pointer issues. Enable compiler warnings.

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Vendor StatusVendor

Debian

php7.4

Release	Status	Fixed Version	Urgency
bullseye	fixed	7.4.33-1+deb11u9	-
bullseye (security)	fixed	7.4.33-1+deb11u10	-
(unstable)	fixed	(unfixed)	-

php8.2

Release	Status	Fixed Version	Urgency
bookworm	fixed	8.2.29-1~deb12u1	-
bookworm (security)	fixed	8.2.30-1~deb12u1	-
(unstable)	fixed	(unfixed)	-

php8.4

Release	Status	Fixed Version	Urgency
trixie	fixed	8.4.11-1	-
trixie (security)	fixed	8.4.16-1~deb13u1	-
forky, sid	fixed	8.4.16-1	-
(unstable)	fixed	8.4.10-1	-

DLA-4254-1 DSA-5967-1

SUSE

Severity: Medium

Product	Status
SUSE Liberty Linux 8	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS	Fixed

EUVD-2025-21276 vulnerability details – vuln.today

Back

PHP EUVD-2025-21276

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Technical ContextAI

RemediationAI

More from same product – last 7 days

Vendor StatusVendor

Debian

SUSE

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External POC / Exploit Code