How severe is CVE-2023-27333?

CVE-2023-27333 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-27333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27333?

CVE-2023-27333 affects Tp-link Archer Ax21 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-27333?

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

Does CVE-2023-27333 have an EU (EUVD) identifier?

Yes. CVE-2023-27333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-31109.

When was CVE-2023-27333 published?

CVE-2023-27333 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-27333

CVE-2023-27333 is a medium-severity vulnerability in Tp-link Archer Ax21 Firmware with a CVSS 3.x base score of 6.8. 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-121.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-31109
Weakness: CWE-121
Affected product: Tp-link Archer Ax21 Firmware
Published: 2024-05-03
Last modified: 2026-06-17

Description

TP-Link Archer AX21 tmpServer Command 0x422 Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer AX21 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of command 0x422 provided to the tmpServer service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19905.

Frequently asked questions

What is CVE-2023-27333?: TP-Link Archer AX21 tmpServer Command 0x422 Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Archer AX21 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of command 0x422 provided to the tmpServer service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19905.
How severe is CVE-2023-27333?: CVE-2023-27333 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-27333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27333?: CVE-2023-27333 affects Tp-link Archer Ax21 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-27333?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-27333 have an EU (EUVD) identifier?: Yes. CVE-2023-27333 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-31109.
When was CVE-2023-27333 published?: CVE-2023-27333 was published on 2024-05-03 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-23-244/

Affected products (1)

cpe:2.3:o:tp-link:archer_ax21_firmware:1.1.3:build_20221125:*:*:*:*:*:*

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