CVE-2025-9784

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• 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

2.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 82.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-08-19.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

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

2025-09-02 13:37Z1 YR AGO

Last updated

2026-08-19 07:39Z16 DAYS AGO

Reserved

2025-09-01

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-404Improper Resource Shutdown or ReleaseClass
• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.2

Document digest

aa4128a72778f08a166554086297d4d1c1da167217b1e58a9307d13222b5e87c

• access.redhat.comRHSA-2025:23143https://access.redhat.com/errata/RHSA-2025:23143vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:0383https://access.redhat.com/errata/RHSA-2026:0383vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:0384https://access.redhat.com/errata/RHSA-2026:0384vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:0386https://access.redhat.com/errata/RHSA-2026:0386vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:33371https://access.redhat.com/errata/RHSA-2026:33371vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:33372https://access.redhat.com/errata/RHSA-2026:33372vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:3889https://access.redhat.com/errata/RHSA-2026:3889vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:3891https://access.redhat.com/errata/RHSA-2026:3891vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:3892https://access.redhat.com/errata/RHSA-2026:3892vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:4915https://access.redhat.com/errata/RHSA-2026:4915vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:4916https://access.redhat.com/errata/RHSA-2026:4916vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:4917https://access.redhat.com/errata/RHSA-2026:4917vendor-advisoryx_refsource_REDHAT
• access.redhat.comRHSA-2026:4924https://access.redhat.com/errata/RHSA-2026:4924vendor-advisoryx_refsource_REDHAT
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-9784vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2392306https://bugzilla.redhat.com/show_bug.cgi?id=2392306issue-trackingx_refsource_REDHAT
• github.comhttps://github.com/undertow-io/undertow/pull/1778
• github.comhttps://github.com/undertow-io/undertow/releases/tag/2.2.38.Final
• issues.redhat.comhttps://issues.redhat.com/browse/UNDERTOW-2598
• kb.cert.orghttps://kb.cert.org/vuls/id/767506
• www.kb.cert.orghttps://www.kb.cert.org/vuls/id/767506