CVE-2025-54874Public exploit

Heap memory corruption via unchecked header failure

Published Aug 5, 2025 · Updated Feb 26, 2026

Out-of-bounds heap write in OpenJPEG 2.5.1 through 2.5.3 allows attackers to corrupt process memory via a truncated JPEG 2000 stream. opj_jp2_read_header continues after opj_j2k_read_header fails, then uses an uninitialized p_image pointer to write color-space and ICC-profile fields. When a caller leaves p_image uninitialized, prior process state determines whether the writes crash the process or overwrite other heap data.

CVSS severityUnavailable
Unscored
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds heap write in OpenJPEG 2.5.1 through 2.5.3 allows attackers to corrupt process memory via a truncated JPEG 2000 stream. opj_jp2_read_header continues after opj_j2k_read_header fails, then uses an uninitialized p_image pointer to write color-space and ICC-profile fields. When a caller leaves p_image uninitialized, prior process state determines whether the writes crash the process or overwrite other heap data.

The record

CVE
CVE-2025-54874
Published
Aug 5, 2025
Updated
Feb 26, 2026
Vendor
Université catholique de Louvain
Product
OpenJPEG
Classifications
CWE-457, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.5.1, <= 2.5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Université catholique de Louvain · OpenJPEGversion=>= 2.5.1, <= 2.5.3

Published CVSS scores

6.6GitHub CNACVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-457Use of Uninitialized Variable
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo