How severe is CVE-2025-8140?

CVE-2025-8140 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-8140 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8140?

CVE-2025-8140 affects Totolink A702r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8140?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-8140 have an EU (EUVD) identifier?

Yes. CVE-2025-8140 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22580.

When was CVE-2025-8140 published?

CVE-2025-8140 was published on 2025-07-25 and last updated on 2026-06-17.

CVE-2025-8140

CVE-2025-8140 is a high-severity vulnerability in Totolink A702r Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 7% (94th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22580
Weakness: CWE-119
Affected product: Totolink A702r Firmware
Published: 2025-07-25
Last modified: 2026-06-17

Description

A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-8140?: A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-8140?: CVE-2025-8140 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-8140 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8140?: CVE-2025-8140 affects Totolink A702r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8140?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-8140 have an EU (EUVD) identifier?: Yes. CVE-2025-8140 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22580.
When was CVE-2025-8140 published?: CVE-2025-8140 was published on 2025-07-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a702r_firmware:4.0.0-b20230721.1521:*:*:*:*:*:*:*

More vulnerabilities in Totolink A702r Firmware

CVE-2019-19825 — Critical (CVSS 9.8): On certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an…
CVE-2025-9783 — High (CVSS 8.8): A vulnerability was determined in TOTOLINK A702R 4.0.0-B20211108.1423. This issue affects the function sub_418030 of…
CVE-2025-9782 — High (CVSS 8.8): A vulnerability was found in TOTOLINK A702R 4.0.0-B20211108.1423. This vulnerability affects the function sub_4466F8 of…
CVE-2025-9781 — High (CVSS 8.8): A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423. This affects the function sub_4162DC of the file…
CVE-2025-9780 — High (CVSS 8.8): A flaw has been found in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this issue is the function sub_419BE0 of the…
CVE-2025-9779 — High (CVSS 8.8): A vulnerability was detected in TOTOLINK A702R 4.0.0-B20211108.1423. Affected by this vulnerability is the function…

All CVEs affecting Totolink A702r Firmware →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-77946 — Critical (CVSS 10.0): A vulnerability was determined in TRENDnet TEW-821DAP 2.2.01b05. Affected by this vulnerability is the function…
CVE-2026-76008 — Critical (CVSS 10.0): A flaw has been found in Comfast CF-N1-S 2.6.0.1. This affects the function get_para_from_uri of the file…
CVE-2026-75784 — Critical (CVSS 10.0): A vulnerability was detected in TRENDnet TEW-WLC100 1v2.07b01. Affected by this issue is the function FUN_0040da4c of…
CVE-2026-74843 — Critical (CVSS 10.0): A vulnerability was determined in Wavlink WN531P3 and WN535M1 V250922. Affected by this vulnerability is the function…
CVE-2026-16367 — Critical (CVSS 10.0): Sandbox escape due to invalid pointer in the Disability Access APIs component. This vulnerability was fixed in Firefox…
CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →