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CVE-2021-26827

HIGHCVSS 7.5/10EPSS 1.70%

Last modified

CVE-2021-26827 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Buffer Overflow in TP-Link WR2041 v1 firmware for the TL-WR2041+ router allows remote attackers to cause a Denial-of-Service (DoS) by sending an HTTP request with a very long "ssid" parameter to the "/userRpm/popupSiteSurveyRpm.html" webpage, which crashes the router.. EPSS estimates a 1.70% chance of exploitation in the next 30 days.

Description

Buffer Overflow in TP-Link WR2041 v1 firmware for the TL-WR2041+ router allows remote attackers to cause a Denial-of-Service (DoS) by sending an HTTP request with a very long "ssid" parameter to the "/userRpm/popupSiteSurveyRpm.html" webpage, which crashes the router.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.70%

74.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Tp-LinkTl-Wr2041\+ FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26827?
Buffer Overflow in TP-Link WR2041 v1 firmware for the TL-WR2041+ router allows remote attackers to cause a Denial-of-Service (DoS) by sending an HTTP request with a very long "ssid" parameter to the "/userRpm/popupSiteSurveyRpm.html" webpage, which crashes the router.
How severe is CVE-2021-26827?
CVE-2021-26827 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.70% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26827?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26827?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST