Buffer overflow in Linksys Re6250
CVE-2025-8820
A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. This vulnerability affects the function wirelessBasic of the file /goform/wirelessBasic. The manipulation of the argument submit_SSID1 leads to stack-based buffer overflow. The attack can be initiated 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.010 (61.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 61st percentile — 61.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000
Affected products
- Linksys Re6250 — versions 20250801
- Linksys Re6250 Firmware — versions 1.0.04.001
- Linksys Re6300 — versions 20250801
- Linksys Re6300 Firmware — versions 1.2.07.001
- Linksys Re6350 — versions 20250801
- Linksys Re6350 Firmware — versions 1.0.04.001
- Linksys Re6500 — versions 20250801
- Linksys Re6500 Firmware — versions 1.0.013.001
- Linksys Re7000 — versions 20250801
- Linksys Re7000 Firmware — versions 1.1.05.003
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md (related, Exploit, Third Party Advisory)
- github.com/wudipjq/my_vuln/blob/main/Linksys1/vuln_54/54.md (Exploit, Third Party Advisory, exploit)
- www.linksys.com/ (Product, product)
Frequently asked questions
- What is CVE-2025-8820?
- CVE-2025-8820 is a high-severity vulnerability in Linksys Re6250, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2025-08-11.
- How severe is CVE-2025-8820?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-8820 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.