How severe is CVE-2021-31659?

CVE-2021-31659 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-31659 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31659?

CVE-2021-31659 primarily affects Tp-link Tl-sg2005 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-31659?

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.

When was CVE-2021-31659 published?

CVE-2021-31659 was published on 2021-06-10 and last updated on 2026-07-05.

CVE-2021-31659

CVE-2021-31659 is a high-severity vulnerability in Tp-link Tl-sg2005 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-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Tp-link Tl-sg2005 Firmware
Published: 2021-06-10
Last modified: 2026-07-05

Description

TP-Link TL-SG2005, TL-SG2008, etc. 1.0.0 Build 20180529 Rel.40524 is vulnerable to Cross Site Request Forgery (CSRF). All configuration information is placed in the URL, without any additional token authentication information. A malicious link opened by the switch administrator may cause the password of the switch to be modified and the configuration file to be tampered with.

Frequently asked questions

What is CVE-2021-31659?: TP-Link TL-SG2005, TL-SG2008, etc. 1.0.0 Build 20180529 Rel.40524 is vulnerable to Cross Site Request Forgery (CSRF). All configuration information is placed in the URL, without any additional token authentication information. A malicious link opened by the switch administrator may cause the password of the switch to be modified and the configuration file to be tampered with.
How severe is CVE-2021-31659?: CVE-2021-31659 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-31659 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31659?: CVE-2021-31659 primarily affects Tp-link Tl-sg2005 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-31659?: 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.
When was CVE-2021-31659 published?: CVE-2021-31659 was published on 2021-06-10 and last updated on 2026-07-05.

References

Affected products (2)

cpe:2.3:o:tp-link:tl-sg2005_firmware:1.0.0:build_20180529_rel.40524:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-sg2008_firmware:1.0.0:build_20180529_rel.40524:*:*:*:*:*:*

More vulnerabilities in Tp-link Tl-sg2005 Firmware

CVE-2021-31658 — High (CVSS 8.1): TP-Link TL-SG2005, TL-SG2008, etc. 1.0.0 Build 20180529 Rel.40524 is affected by an Array index error. The interface…

All CVEs affecting Tp-link Tl-sg2005 Firmware →

Other CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities

CVE-2025-32642 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in appsbd Vite Coupon vite-coupon allows Remote Code Inclusion.This…
CVE-2025-23922 — Critical (CVSS 10.0): Cross-Site Request Forgery (CSRF) vulnerability in Harsh iSpring Embedder embed-ispring allows Upload a Web Shell to a…
CVE-2017-5145 — Critical (CVSS 10.0): An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV prior to firmware…
CVE-2019-25729 — Critical (CVSS 9.8): PDF Signer 3.0 contains a server-side template injection vulnerability that allows unauthenticated attackers to execute…
CVE-2025-48340 — Critical (CVSS 9.8): Cross-Site Request Forgery (CSRF) vulnerability in Danny Vink User Profile Meta Manager user-profile-meta allows…
CVE-2025-2907 — Critical (CVSS 9.8): The Order Delivery Date WordPress plugin before 12.3.1 does not have authorization and CSRF checks when importing…

Browse all CWE-352 (Cross-Site Request Forgery (CSRF)) vulnerabilities →