CVE-2026-21018
Cisco SveService Buffer Overflow
Description
Out-of-bounds write in SveService prior to SMR May-2026 Release 1 allows local privileged attackers to execute arbitrary code.
INFO
Published Date :
May 13, 2026, 6:16 a.m.
Last Modified :
Oct. 26, 2026, 2:10 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-21018
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 3af57064-a867-422c-b2ad-40307b65c458 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update to SMR May-2026 Release 1.
- Install the latest security patches.
Public PoC/Exploit Available at Github
CVE-2026-21018 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-21018.
| URL | Resource |
|---|---|
| https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=05 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-21018 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-21018
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
A minimal PoC for CVE-2026-21018, demonstrating how it works
Java Shell
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-21018 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-21018 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: Samsung Mobile Devices de Samsung Mobile, Description: Escritura fuera de límites en SveService anterior a la versión 1 de SMR de mayo de 2026 permite a atacantes locales privilegiados ejecutar código arbitrario. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Samsung Mobile', 'product': 'Samsung Mobile Devices', 'versions': [{'status': 'unaffected', 'version': 'SMR May-2026 Release in Android 14, 15, 16', 'lessThan': '*', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-21018', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-05-14T03:56:03.326394Z'} -
Initial Analysis by [email protected]
May. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 Added CPE Configuration OR *cpe:2.3:o:samsung:android:14.0:-:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-apr-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-aug-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-dec-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-feb-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jan-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jul-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jun-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-mar-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-may-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-nov-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-nov-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-oct-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-oct-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-sep-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-dec-2023-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-feb-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jan-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-mar-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-apr-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-may-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jun-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jul-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-apr-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-aug-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-dec-2021-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-feb-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jan-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jul-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jun-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-mar-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-may-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-nov-2021-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-sep-2022-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-aug-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-sep-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-oct-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jan-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-dec-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-nov-2024-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-feb-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-mar-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-apr-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:-:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-apr-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-mar-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jun-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-may-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-jun-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-may-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jul-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-jul-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:-:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-aug-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-aug-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-aug-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-sep-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-sep-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-sep-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-oct-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-oct-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-oct-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-nov-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-nov-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-nov-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-dec-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-dec-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-dec-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-feb-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-jan-2025-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-jan-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-jan-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-jan-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-feb-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-feb-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-feb-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-mar-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-mar-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-mar-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:15.0:smr-apr-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:16.0:smr-apr-2026-r1:*:*:*:*:*:* *cpe:2.3:o:samsung:android:14.0:smr-apr-2026-r1:*:*:*:*:*:* Added Reference Type Samsung Mobile: https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=05 Types: Vendor Advisory -
New CVE Received by [email protected]
May. 13, 2026
Action Type Old Value New Value Added Description Out-of-bounds write in SveService prior to SMR May-2026 Release 1 allows local privileged attackers to execute arbitrary code. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added Reference https://security.samsungmobile.com/securityUpdate.smsb?year=2026&month=05