How severe is CVE-2024-27521?

CVE-2024-27521 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-27521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-27521?

CVE-2024-27521 affects Totolink A3300r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-27521?

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-2024-27521 have an EU (EUVD) identifier?

Yes. CVE-2024-27521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-24717.

When was CVE-2024-27521 published?

CVE-2024-27521 was published on 2024-03-26 and last updated on 2026-06-17.

CVE-2024-27521

CVE-2024-27521 is a high-severity vulnerability in Totolink A3300r Firmware with a CVSS 3.x base score of 8.0. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-24717
Weakness: CWE-78
Affected product: Totolink A3300r Firmware
Published: 2024-03-26
Last modified: 2026-06-17

Description

TOTOLINK A3300R V17.0.0cu.557_B20221024 was discovered to contain an unauthenticated remote command execution (RCE) vulnerability via multiple parameters in the "setOpModeCfg" function. This security issue allows an attacker to take complete control of the device. In detail, exploitation allows unauthenticated, remote attackers to execute arbitrary system commands with administrative privileges (i.e., as user "root").

Frequently asked questions

What is CVE-2024-27521?: TOTOLINK A3300R V17.0.0cu.557_B20221024 was discovered to contain an unauthenticated remote command execution (RCE) vulnerability via multiple parameters in the "setOpModeCfg" function. This security issue allows an attacker to take complete control of the device. In detail, exploitation allows unauthenticated, remote attackers to execute arbitrary system commands with administrative privileges (i.e., as user "root").
How severe is CVE-2024-27521?: CVE-2024-27521 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-27521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-27521?: CVE-2024-27521 affects Totolink A3300r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-27521?: 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-2024-27521 have an EU (EUVD) identifier?: Yes. CVE-2024-27521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-24717.
When was CVE-2024-27521 published?: CVE-2024-27521 was published on 2024-03-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:*

More vulnerabilities in Totolink A3300r Firmware

CVE-2026-31181 — Critical (CVSS 9.8): An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary…
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