How severe is CVE-2021-27210?

CVE-2021-27210 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-27210 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27210?

CVE-2021-27210 affects Tp-link Archer C5v Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27210?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27210 published?

CVE-2021-27210 was published on 2021-02-13 and last updated on 2026-06-17.

CVE-2021-27210

CVE-2021-27210 is a medium-severity vulnerability in Tp-link Archer C5v Firmware with a CVSS 3.x base score of 6.5. 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-312.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-312
Affected product: Tp-link Archer C5v Firmware
Published: 2021-02-13
Last modified: 2026-06-17

Description

TP-Link Archer C5v 1.7_181221 devices allows remote attackers to retrieve cleartext credentials via [USER_CFG#0,0,0,0,0,0#0,0,0,0,0,0]0,0 to the /cgi?1&5 URI.

Frequently asked questions

What is CVE-2021-27210?: TP-Link Archer C5v 1.7_181221 devices allows remote attackers to retrieve cleartext credentials via [USER_CFG#0,0,0,0,0,0#0,0,0,0,0,0]0,0 to the /cgi?1&5 URI.
How severe is CVE-2021-27210?: CVE-2021-27210 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-27210 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27210?: CVE-2021-27210 affects Tp-link Archer C5v Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27210?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27210 published?: CVE-2021-27210 was published on 2021-02-13 and last updated on 2026-06-17.

References

https://gokay.org/tp-links-archer-c5v-improper-authorization/

Affected products (1)

cpe:2.3:o:tp-link:archer_c5v_firmware:1.7_181221:*:*:*:*:*:*:*

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