CVE-2025-10773
Published: 22 September 2025
Summary
CVE-2025-10773 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Lb-Link Bl-Ac2100 Firmware. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 39.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly mitigates the stack-based buffer overflow by enforcing validation of the 'Type' argument in the delshrpath function to prevent improper memory operations.
Implements memory protection mechanisms like stack canaries, ASLR, and DEP to block exploitation of the stack buffer overflow in the Web Management Interface.
Requires timely remediation of the identified buffer overflow flaw through patching or workarounds for affected B-Link BL-AC2100 firmware up to 1.0.3.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated stack-based buffer overflow in the router's web management interface (/goform/set_delshrpath_cfg) enables remote exploitation of a public-facing application (T1190) and application/system exploitation for denial of service (T1499.004), potentially paralyzing the device and network.
NVD Description
A security flaw has been discovered in B-Link BL-AC2100 up to 1.0.3. Affected by this issue is the function delshrpath of the file /goform/set_delshrpath_cfg of the component Web Management Interface. The manipulation of the argument Type results in stack-based buffer…
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overflow. The attack may be performed from remote. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.
Deeper analysisAI
CVE-2025-10773 is a stack-based buffer overflow vulnerability affecting the delshrpath function in the /goform/set_delshrpath_cfg file of the Web Management Interface component in B-Link BL-AC2100 routers up to version 1.0.3. The issue arises from manipulation of the Type argument, as documented in the CVE description published on 2025-09-22.
The vulnerability can be exploited remotely by authenticated users with low privileges (PR:L), requiring low attack complexity (AC:L) and no user interaction (UI:N). Successful exploitation grants high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), yielding a CVSS v3.1 base score of 8.8. It maps to CWEs-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-121 (Stack-based Buffer Overflow), and CWE-787 (Out-of-bounds Write).
VulDB advisories note that the vendor was contacted early regarding disclosure but provided no response, and no patches are referenced. A public exploit is available in a GitHub repository at https://github.com/maximdevere/CVE2/blob/main/README.md, increasing the risk of active exploitation. Security practitioners should isolate affected devices and monitor for anomalous Web Management Interface activity until firmware updates are available.
Details
- CWE(s)