How severe is CVE-2023-44420?

CVE-2023-44420 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-2023-44420 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-44420?

CVE-2023-44420 affects Dlink Dir-x3260 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-44420?

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-2023-44420 have an EU (EUVD) identifier?

Yes. CVE-2023-44420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48760.

When was CVE-2023-44420 published?

CVE-2023-44420 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-44420

CVE-2023-44420 is a high-severity vulnerability in Dlink Dir-x3260 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-303.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-48760
Weakness: CWE-303
Affected product: Dlink Dir-x3260 Firmware
Published: 2024-05-03
Last modified: 2026-06-17

Description

D-Link DIR-X3260 prog.cgi Incorrect Implementation of Authentication Algorithm Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-X3260 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the prog.cgi executable. The issue results from an incorrect implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the device. Was ZDI-CAN-21100.

Frequently asked questions

What is CVE-2023-44420?: D-Link DIR-X3260 prog.cgi Incorrect Implementation of Authentication Algorithm Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of D-Link DIR-X3260 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the prog.cgi executable. The issue results from an incorrect implementation of the authentication algorithm. An attacker can leverage this vulnerability to bypass authentication on the device. Was ZDI-CAN-21100.
How severe is CVE-2023-44420?: CVE-2023-44420 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-2023-44420 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-44420?: CVE-2023-44420 affects Dlink Dir-x3260 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-44420?: 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-2023-44420 have an EU (EUVD) identifier?: Yes. CVE-2023-44420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-48760.
When was CVE-2023-44420 published?: CVE-2023-44420 was published on 2024-05-03 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1518/

Affected products (1)

cpe:2.3:o:dlink:dir-x3260_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-x3260 Firmware

CVE-2023-44419 — High (CVSS 8.8): D-Link DIR-X3260 Prog.cgi Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2023-44418 — High (CVSS 8.8): D-Link DIR-X3260 Prog.cgi Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2023-35723 — High (CVSS 8.8): D-Link DIR-X3260 prog.cgi SOAPAction Command Injection Remote Code Execution Vulnerability. This vulnerability allows…
CVE-2023-51613 — High (CVSS 8.0): D-Link DIR-X3260 prog.cgi SetDynamicDNSSettings Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This…
CVE-2023-44427 — High (CVSS 8.0): D-Link DIR-X3260 SetSysEmailSettings SMTPServerAddress Command Injection Remote Code Execution Vulnerability. This…
CVE-2023-44426 — High (CVSS 8.0): D-Link DIR-X3260 SetSysEmailSettings AccountPassword Command Injection Remote Code Execution Vulnerability. This…

All CVEs affecting Dlink Dir-x3260 Firmware →

Other CWE-303 vulnerabilities

CVE-2025-13390 — Critical (CVSS 10.0): The WP Directory Kit plugin for WordPress is vulnerable to authentication bypass in all versions up to, and including,…
CVE-2025-12421 — Critical (CVSS 9.9): Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that…
CVE-2025-12419 — Critical (CVSS 9.9): Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly…
CVE-2025-66489 — Critical (CVSS 9.8): Cal.com is open-source scheduling software. Prior to 5.9.8, A flaw in the login credentials provider allows an attacker…
CVE-2025-21311 — Critical (CVSS 9.8): Windows NTLM V1 Elevation of Privilege Vulnerability
CVE-2024-10127 — Critical (CVSS 9.8): Authentication bypass condition in LDAP authentication in M-Files server versions before 24.11 supported usage of…

Browse all CWE-303 vulnerabilities →