CVE-2025-40929

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.46% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 39.5% of scored records. A rank, not a probability.

NVD base score

5.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-09-08 15:08Z1 YR AGO

Last updated

2025-11-04 21:10Z11 MO AGO

Reserved

2025-04-16

Assigning CNA

CPANSec

Record state

PUBLISHED

Severity

Medium (CVSS 5.6)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant

Data version

5.2

Document digest

36395554b48c2548aaef6b0c7f68b2de6f3aaf8d413a7ec6b66545fc346fa394

• metacpan.orghttps://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.39/source/XS.xs#L713related
• metacpan.orghttps://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.40/changesrelease-notes
• github.comhttps://github.com/rurban/Cpanel-JSON-XS/commit/378236219eaa35742c3962ecbdee364903b0a1f2.patchpatch
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/09/msg00034.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/09/08/1