Background exploitation KEV catalog No authentication
CVE-2025-21043

Samsung Mobile Devices Out-of-Bounds Write Vulnerability

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

CheckOps priority index
5.4/10 Patch within 7 days
Severity8.8
Probability0.2
Exploitation3/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 2.2% higher than 82.6% of CVEs
CVSS 3.1 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:
Exploited for 397 days 02 Oct 2025
CISA due date 23 Oct 2025 for US federal agencies

Exploitation probability EPSS · FIRST

05010025 Sep05 Oct15 Oct24 Oct02 Nov
EPSS probability (%)Percentile among all CVEs

Exploitation signals 3 / 5

  • KEV catalog (CISA)02 Oct 2025
  • Exploited in EUVD (ENISA)02 Oct 2025
  • Used by ransomwareno
  • EPSS above 10 %2.2%
  • No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Affected products

Samsung Mobile DevicesMobile Devices
Affected versions
  • patch: SMR Sep-2025 Release in Android 13, 14, 15, 16
Weaknesses (CWE)

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

  1. Published

  2. Exploitation reported (ENISA)

  3. Added to the KEV catalog

  4. CISA remediation due date

References

Other exploited vulnerabilities from the same vendor

  • CVE-2024-7399Samsung MagicINFO 9 Server Path Traversal Vulnerability
    8.1 · Background exploitation
  • CVE-2025-21042Samsung Mobile Devices Out-of-Bounds Write Vulnerability
    7.0 · Background exploitation
  • CVE-2025-4632Samsung MagicINFO 9 Server Path Traversal Vulnerability
    7.0 · Background exploitation
  • CVE-2022-22265Samsung Mobile Devices Use-After-Free Vulnerability
    3.2 · Background exploitation
  • CVE-2021-25489Samsung Mobile Devices Improper Input Validation Vulnerability
    2.5 · Background exploitation
  • CVE-2021-25487Samsung Mobile Devices Out-of-Bounds Read Vulnerability
    4.1 · Background exploitation

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Sources: CISA KEV · ENISA EUVD · FIRST EPSS · OSV. Public data aggregated by CheckOps, updated automatically. Source texts remain the property of their authors. All exploited vulnerabilities