High severity · published Jul 25, 2025
CVE-2025-8139
A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521
8.8
CVSS
1.2%
EPSS
No
On KEV
Description
A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been classified as critical. This affects an unknown part of the file /boafrm/formPortFw of the component HTTP POST Request Handler. The manipulation of the argument service_type leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
A702r Firmware · Totolink
4.0.0-b20230721.1521 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-8139
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-8139
Exploit
https://github.com/panda666-888/vuls/blob/main/totolink/a702r/formPortFw.md
Permissions Required
https://vuldb.com/?ctiid.317535
Third Party Advisory
https://vuldb.com/?id.317535
Third Party Advisory
https://vuldb.com/?submit.620485
Product
https://www.totolink.net/
More from A702r Firmware
9.8
CVE-2019-19825
On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the boafrm/formLogin URI, leading to a CAPTCHA…
8.8
CVE-2025-9783
A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423
8.8
CVE-2025-9782
A vulnerability was found in TOTOLINK A702R 4.0.0-B20211108.1423
8.8
CVE-2025-9781
A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423
8.8
CVE-2025-9780
A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423