CVE-2025-8824
Published: 11 August 2025
Summary
CVE-2025-8824 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Linksys Re6250 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 24.1% 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).
Deeper analysis
CVE-2025-8824 is a stack-based buffer overflow vulnerability in the setRIP function within the /goform/setRIP file of Linksys Wi-Fi range extenders, specifically models RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 running firmware versions up to 20250801. The issue arises from improper handling of the RIPmode and RIPpasswd arguments, as classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow). It carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
The vulnerability can be exploited remotely by an attacker with low privileges (such as authenticated access to the device) over the network, requiring no user interaction. Successful exploitation allows arbitrary code execution, potentially granting high levels of confidentiality, integrity, and availability impact, including full device compromise through the buffer overflow.
Advisories from VulDB and a public GitHub disclosure detail the vulnerability, including a proof-of-concept exploit. The vendor was notified early but has not responded or issued patches as of the CVE publication on 2025-08-11. Security practitioners should isolate affected devices, monitor for exploitation attempts using the disclosed POC, and seek any unofficial firmware updates, as the exploit is publicly available and may be actively used.
In notable context, the exploit has been fully disclosed on GitHub, increasing the risk of widespread targeting of these consumer range extenders.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-24106
Vulnerability details
A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. Affected by this issue is the function setRIP of the file /goform/setRIP. The manipulation of the argument RIPmode/RIPpasswd leads to stack-based buffer overflow. The…
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attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack-based buffer overflow in the public-facing web endpoint (/goform/setRIP) on Linksys range extenders enables remote exploitation for potential code execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-10 requires validation of inputs like RIPmode and RIPpasswd to prevent the stack-based buffer overflow from improper restriction of operations within memory bounds.
SI-16 implements memory protection mechanisms such as stack canaries and non-executable stacks to mitigate exploitation of the stack-based buffer overflow.
SI-2 mandates identification, reporting, and correction of flaws like this buffer overflow vulnerability through timely patching or firmware updates.