CVE-2025-5619
Published: 04 June 2025
Summary
CVE-2025-5619 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Tenda Ch22 Firmware. Its CVSS base score is 8.7 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 17.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A critical stack-based buffer overflow vulnerability, tracked as CVE-2025-5619, affects the Tenda CH22 router running firmware version 1.0.0.1. The flaw resides in the formaddUserName function within the /goform/addUserName endpoint, where improper handling of the Password argument permits out-of-bounds memory writes, as indicated by the associated CWEs 119, 121, and 787. The issue carries a CVSS 4.0 score of 8.7 and can be triggered over the network.
An authenticated remote attacker can supply a crafted Password value to the affected endpoint, resulting in memory corruption that may allow arbitrary code execution or a full device compromise. Publicly available exploit details confirm the attack vector requires no user interaction beyond network access and valid credentials.
No vendor advisory or patch information is referenced in the available sources, though the manufacturer maintains a product page at tenda.com.cn. The EPSS score remains flat at 0.0165 with no observed increase after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-16934
Vulnerability details
A vulnerability, which was classified as critical, has been found in Tenda CH22 1.0.0.1. This issue affects the function formaddUserName of the file /goform/addUserName. The manipulation of the argument Password leads to stack-based buffer overflow. The attack may be initiated…
more
remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the router's public-facing web interface (/goform/addUserName) via Password parameter enables remote code execution, directly mapping to T1190: Exploit Public-Facing Application.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Memory protections (e.g., W^X, ASLR) make exploitation of buffer-boundary violations far harder to turn into code execution.
Ongoing control assessments and code testing (static/dynamic analysis, fuzzing) surface memory buffer restriction failures, which are then remediated before release.
Managed runtimes used by platform-independent applications (e.g., JVM, CLR) enforce memory safety, preventing most buffer overflows that require direct memory manipulation.
Detects exploitation attempts that produce memory corruption, crashes, or anomalous behavior.