# CVE-2018-21139: Information disclosure in n/a > Attackers can disclose sensitive information from various NETGEAR routers and modems, requiring firmware upgrades to mitigate. - **Severity:** High 7.1 (`CVSS:3.0/AC:L/AV:A/A:N/C:H/I:L/PR:N/S:U/UI:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 23 Apr 2020 - **Updated:** 5 Aug 2024 - **Also known as:** GHSA-87jj-5mq8-98pw ## What is CVE-2018-21139? CVE-2018-21139 is a high-severity vulnerability in Netgear D6100 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description Certain NETGEAR devices are affected by disclosure of sensitive information. This affects D1500 before 1.0.0.27, D500 before 1.0.0.27, D6100 before 1.0.0.58, D6200 before 1.1.00.30, D6220 before 1.0.0.46, D6400 before 1.0.0.82, D7000 before 1.0.1.68, D7000v2 before 1.0.0.51, D7800 before 1.0.1.42, D8500 before 1.0.3.42, DC112A before 1.0.0.40, DGN2200Bv4 before 1.0.0.102, DGN2200v4 before 1.0.0.102, JNR1010v2 before 1.1.0.54, JR6150 before 1.0.1.18, JWNR2010v5 before 1.1.0.54, PR2000 before 1.0.0.24, R6020 before 1.0.0.34, R6050 before 1.0.1.18, R6080 before 1.0.0.34, R6100 before 1.0.1.22, R6120 before 1.0.0.42, R6220 before 1.1.0.68, R6250 before 1.0.4.30, R6300v2 before 1.0.4.32, R6400 before 1.0.1.44, R6400v2 before 1.0.2.60, R6700 before 1.0.1.48, R6700v2 before 1.2.0.24, R6800 before 1.2.0.24, R6900 before 1.0.1.48, R6900P before 1.3.1.44, R6900v2 before 1.2.0.24, R7000 before 1.0.9.34, R7000P before 1.3.1.44, R7100LG before 1.0.0.48, R7300 before 1.0.0.68, R7500 before 1.0.0.124, R7500v2 before 1.0.3.38, R7900 before 1.0.2.16, R7900P before 1.4.1.24, R8000 before 1.0.4.18, R8000P before 1.4.1.24, R8300 before 1.0.2.122, R8500 before 1.0.2.122, WN3000RP before 1.0.0.68, WN3000RPv2 before 1.0.0.68, WNDR3400v3 before 1.0.1.18, WNDR3700v4 before 1.0.2.102, WNDR3700v5 before 1.1.0.54, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.56, WNDR4500v3 before 1.0.0.56, WNR1000v4 before 1.1.0.54, WNR2020 before 1.1.0.54, WNR2050 before 1.1.0.54, and WNR3500Lv2 before 1.2.0.54. Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) ## Which versions are affected by CVE-2018-21139? It affects 49 products. Products: Netgear D1500 Firmware, Netgear D500 Firmware, Netgear D6100 Firmware, Netgear D6200 Firmware, Netgear D6220 Firmware, Netgear D6400 Firmware, Netgear D7000 Firmware, Netgear D7800 Firmware, Netgear D8500 Firmware, Netgear Dc112a Firmware, Netgear Dgn2200 Firmware, Netgear Dgn2200b Firmware, Netgear Jnr1010 Firmware, Netgear Jr6150 Firmware, Netgear Jwnr2010 Firmware, Netgear Pr2000 Firmware, Netgear R6020 Firmware, Netgear R6050 Firmware, Netgear R6080 Firmware, Netgear R6100 Firmware and 29 more. ## How do I fix CVE-2018-21139? No fix has been published for CVE-2018-21139 yet. Limit exposure of the affected software until one is available. ## Is CVE-2018-21139 being exploited? There is no known exploitation of CVE-2018-21139 in the wild and no public exploit code. ## Other vulnerabilities in Netgear D6100 Firmware - [CVE-2017-18703](https://insights.sbomify.com/CVE-2017-18703/): Cross-site request forgery in n/a (high 8.8) - [CVE-2017-18798](https://insights.sbomify.com/CVE-2017-18798/): Misconfiguration in n/a (high 8.4) - [CVE-2018-21230](https://insights.sbomify.com/CVE-2018-21230/): Misconfiguration in n/a (medium 5.2) - [CVE-2018-21231](https://insights.sbomify.com/CVE-2018-21231/): Misconfiguration in n/a (medium 5.2) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2018-21139 and fix it if it is affected. What it is: CVE-2018-21139 is a high-severity vulnerability in Netgear D6100 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2018-21139 in the wild and no public exploit code. Affected product: Netgear D6100 Firmware. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2018-21139/ (Markdown: https://insights.sbomify.com/CVE-2018-21139/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2018-21139 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-21139 - OSV: https://osv.dev/vulnerability/CVE-2018-21139 --- From sbomify Insights: https://insights.sbomify.com/CVE-2018-21139/ Summaries are generated and may contain mistakes; the official description above is the record.