CVE-2018-17786
CVE-2018-17786 is a critical-severity vulnerability in D-link Dir-823g Firmware with a CVSS 3.x base score of 9.8. 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-287.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-287
- Affected product: D-link Dir-823g Firmware
- Published:
- Last modified:
Description
On D-Link DIR-823G devices, ExportSettings.sh, upload_settings.cgi, GetDownLoadSyslog.sh, and upload_firmware.cgi do not require authentication, which allows remote attackers to execute arbitrary code.
Frequently asked questions
- What is CVE-2018-17786?
- On D-Link DIR-823G devices, ExportSettings.sh, upload_settings.cgi, GetDownLoadSyslog.sh, and upload_firmware.cgi do not require authentication, which allows remote attackers to execute arbitrary code.
- How severe is CVE-2018-17786?
- CVE-2018-17786 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-17786 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-17786?
- CVE-2018-17786 affects D-link Dir-823g Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-17786?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-17786 published?
- CVE-2018-17786 was published on 2018-10-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:d-link:dir-823g_firmware:-:*:*:*:*:*:*:*
More vulnerabilities in D-link Dir-823g Firmware
- CVE-2019-7297 — Critical (CVSS 9.8): An issue was discovered on D-Link DIR-823G devices with firmware through 1.02B03. A command Injection vulnerability…
- CVE-2018-17881 — Critical (CVSS 9.8): On D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 SetPasswdSettings commands without…
- CVE-2018-17787 — Critical (CVSS 9.8): On D-Link DIR-823G devices, the GoAhead configuration allows /HNAP1 Command Injection via shell metacharacters in the…
- CVE-2018-17880 — High (CVSS 7.5): On D-Link DIR-823G 2018-09-19 devices, the GoAhead configuration allows /HNAP1 RunReboot commands without…
All CVEs affecting D-link Dir-823g Firmware →
Other CWE-287 (Improper Authentication) vulnerabilities
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- CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
- CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
- CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
- CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
- CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…
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