How severe is CVE-2023-51626?

CVE-2023-51626 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-51626 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51626?

CVE-2023-51626 affects Dlink Dcs-8300lhv2 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-51626?

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-2023-51626 have an EU (EUVD) identifier?

Yes. CVE-2023-51626 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56338.

When was CVE-2023-51626 published?

CVE-2023-51626 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-51626

CVE-2023-51626 is a high-severity vulnerability in Dlink Dcs-8300lhv2 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (67th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56338
Weakness: CWE-787
Affected product: Dlink Dcs-8300lhv2 Firmware
Published: 2024-05-03
Last modified: 2026-06-17

Description

D-Link DCS-8300LHV2 RTSP ValidateAuthorizationHeader Username Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DCS-8300LHV2 IP cameras. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the Authorization header by the RTSP server, which listens on TCP port 554. 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-21320.

Frequently asked questions

What is CVE-2023-51626?: D-Link DCS-8300LHV2 RTSP ValidateAuthorizationHeader Username Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DCS-8300LHV2 IP cameras. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the Authorization header by the RTSP server, which listens on TCP port 554. 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-21320.
How severe is CVE-2023-51626?: CVE-2023-51626 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-51626 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51626?: CVE-2023-51626 affects Dlink Dcs-8300lhv2 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-51626?: 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-2023-51626 have an EU (EUVD) identifier?: Yes. CVE-2023-51626 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56338.
When was CVE-2023-51626 published?: CVE-2023-51626 was published on 2024-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dcs-8300lhv2_firmware:*:*:*:*:*:*:*:*

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CVE-2023-51629 — High (CVSS 8.8): D-Link DCS-8300LHV2 ONVIF Hardcoded PIN Authentication Bypass Vulnerability. This vulnerability allows network-adjacent…
CVE-2023-51624 — High (CVSS 8.8): D-Link DCS-8300LHV2 RTSP ValidateAuthorizationHeader Nonce Stack-Based Buffer Overflow Remote Code Execution…
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CVE-2023-51625 — High (CVSS 8.0): D-Link DCS-8300LHV2 ONVIF SetSystemDateAndTime Command Injection Remote Code Execution Vulnerability. This…

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