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NVD / CVE Program· CNA SamsungMobile

CVE-2025-21043: Out-of-bounds write in libimagecodec.quram.so prior to SMR Sep-2025 Release 1 allows remote attackers to execute arbitrary code.

Noroxi assessment

Priority: This week (action score 70/100)

  • CISA has confirmed exploitation in the wild (Oct 2, 2025). Remediation deadline for US federal agencies: Oct 23, 2025.
  • Probability of exploitation in the next 30 days: 2.2% (FIRST EPSS); higher than 82.7% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Don’t wait for the next maintenance window. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded
Published
Sep 12, 2025
Updated
Oct 8, 2026
EPSS
2.2% · 82th percentile

Report tools

JSON

Action score

70

This week

Don’t wait for the next maintenance window.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
1 / 30 · 2.2%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · SamsungMobile
8.8
1.0 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Oct 2, 2025. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Oct 23, 2025.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-21043

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
samsungandroid

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • samsung android13.0
  • samsung android14.0
  • samsung android15.0
  • samsung android16.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (SamsungMobile). Independent of NVD's CPE analysis and usually ahead of it.

  • Samsung Mobile Samsung Mobile Devices

    • SMR Sep-2025 Release in Android 13, 14, 15, 16not affected

Same product

samsung: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-21042Out-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.KEV
    80Now
  • CVE-2021-25487Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it resKEV
    61This week
  • CVE-2021-25337Improper access control in clipboard service in Samsung mobile devices prior to SMR Mar-2021 Release 1 allows untrusted applications to readKEV
    59Plan

Published before and after this one in the same product

  • ← EarlierCVE-2025-21041Sep 3, 2025 · Insecure Storage of Sensitive Information in Secure Folder prior to Android 16 allows local attackers to access sensitive information.
    22Monitor
  • ← EarlierCVE-2025-21028Sep 3, 2025 · Improper privilege management in ThemeManager prior to SMR Sep-2025 Release 1 allows local privileged attackers to reuse trial items.
    22Monitor
  • Later →CVE-2025-21044Oct 10, 2025 · Out-of-bounds write in fingerprint trustlet prior to SMR Oct-2025 Release 1 allows local privileged attackers to write out-of-bounds memory.
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. CISA KEV+20 d
  3. TodayNov 6, 2026+420 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-210420 days apartOut-of-bounds write in libimagecodec.quram.so prior to SMR Apr-2025 Release 1 allows remote attackers to execute arbitrary code.KEV
    80Now
  • CVE-2024-49415283 days apartOut-of-bound write in libsaped.so prior to SMR Dec-2024 Release 1 allows remote attackers to execute arbitrary code.
    39Monitor
  • CVE-2024-34666339 days apartOut-of-bounds write in parsing h.264 format in a specific mode in librtppayload.so prior to SMR Oct-2024 Release 1 allows remote attackers t
    35Monitor
  • CVE-2024-34667339 days apartOut-of-bounds write in parsing h.265 format in librtppayload.so prior to SMR Oct-2024 Release 1 allows remote attackers to execute arbitrary
    35Monitor
  • CVE-2024-34668339 days apartOut-of-bounds write in parsing h.263 format in librtppayload.so prior to SMR Oct-2024 Release 1 allows remote attackers to execute arbitrary
    35Monitor
  • CVE-2024-34669339 days apartOut-of-bounds write in parsing h.263+ format in librtppayload.so prior to SMR Oct-2024 Release 1 allows remote attackers to execute arbitrar
    35Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records