CVE-2020-25079
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn issue was discovered on D-Link DCS-2530L before 1.06.01 Hotfix and DCS-2670L through 2.02 devices. cgi-bin/ddns_enc.cgi allows authenticated command injection.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceAuthenticated command injection vulnerability in the cgi-bin/ddns_enc.cgi script on D-Link DCS-2530L (before 1.06.01 Hotfix) and DCS-2670L (through 2.02) cameras allows remote attackers to execute arbitrary commands by injecting shell metacharacters into ddns configuration parameters.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 1.03.04< 1.03.02< 2.01.01all versions< 1.04.02< 2.01.10< 2.03.01<= 1.05.05CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the D-Link camera modelAccess the camera's web interface and look for the model number in the device info or status page, or use network enumeration to identify the device via its HTTP response headers or mDNS/Bonjour service nameAffected if The device model is one of: DCS-4703E, DCS-4705E, DCS-4802E, DCS-P703, DCS-4603, DCS-4622, DCS-4701E, or DCS-2530L
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Locate the firmware versionIn the camera web interface, navigate to Setup, System, or About page to find the firmware version displayed as 'Firmware Version' or 'Firmware Upgrade' sectionAffected if The installed firmware version is lower than the safe version for your model: 4703E < 1.03.04, 4705E < 1.03.02, 4802E < 2.01.01, P703 = any version, 4603 < 1.04.02, 4622 < 2.01.10, 4701E < 2.03.01, 2530L <= 1.05.05
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Verify the vulnerable CGI endpoint existsAttempt to access the URL path /cgi-bin/ddns_enc.cgi on the camera's IP address using a web browser or curl command. Note: this may return an authentication prompt or error messageAffected if The endpoint responds with any HTTP response (including 401 authentication required) rather than a 404 Not Found, indicating the CGI interface is present
You are affected if you have a D-Link DCS camera model listed in the affected products and your current firmware version falls below the safe version threshold for that model.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.03.021.03.041.04.02
Apply vendor firmware updates (1.06.01 Hotfix for DCS-2530L and appropriate patch for DCS-2670L). If patching is not immediately feasible, restrict network access to the device management interface and disable unneeded CGI endpoints.
Model-specific firmware: DCS-4703e: 1.03.04+, DCS-4705e: 1.03.02+, DCS-4802e: 2.01.01+, DCS-4603: 1.04.02+, DCS-4622: 2.01.10+, DCS-4701e: 2.03.01+, DCS-2530L: 1.06.01+
- 1. Identify the exact model number of your D-Link DCS camera(s) from the affected list: DCS-4703e, DCS-4705e, DCS-4802e, DCS-P703, DCS-4603, DCS-4622, DCS-4701e, or DCS-2530L
- 2. Access the camera's web interface or administrative console
- 3. Navigate to the firmware version information page to identify the current firmware version installed
- 4. Visit the official D-Link support website (support.dlink.com) and search for your specific camera model
- 5. Download the firmware update that matches or exceeds the fixed version for your model: DCS-4703e: >=1.03.04, DCS-4705e: >=1.03.02, DCS-4802e: >=2.01.01, DCS-4603: >=1.04.02, DCS-4622: >=2.01.10, DCS-4701e: >=2.03.01, DCS-2530L: >=1.06.01
- 6. Follow D-Link's documented firmware upgrade procedure for your specific model (typically involves uploading the .bin file through the web interface)
- 7. After upgrading, verify the new firmware version is correctly installed
- 8. For DCS-P703 (no patch available): isolate the device on a restricted network segment, disable remote access if possible, or replace the device
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-25079 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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