CVE-2020-25786: webinc/js/info.php on D-Link DIR-816L 2.06.B09_BETA and DIR-803 1.04.B02 devices allows XSS via the HTTP Refer
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MEDIUM 6.1MITIGATEMITIGATEMITIGATE
CVE-2020-25786 is a medium-severity flaw (CVSS 6.1) affecting dir-803 firmware, dir-816l firmware, dir-645 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
webinc/js/info.php on D-Link DIR-816L 2.06.B09_BETA and DIR-803 1.04.B02 devices allows XSS via the HTTP Referer header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: this is typically not exploitable because of URL encoding (except in Internet Explorer) and because a web page cannot specify that a client should make an additional HTTP request with an arbitrary Referer header
Why this priority
Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
dlink dir-803 firmware MITIGATE
Affected: 1.04.b02
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.04.b02
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
dlink dir-816l firmware MITIGATE
Affected: 2.06 · 2.06.b09 beta
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.06
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
dlink dir-645 firmware MITIGATE
Affected: 1.06b01
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.06b01
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
dlink dir-815 firmware MITIGATE
Affected: 2.07.b01
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.07.b01
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
dlink dir-860l firmware MITIGATE
Affected: 1.10b04
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10b04
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
dlink dir-865l firmware MITIGATE
Affected: 1.08b01
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.08b01
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-25786?
dir-803 firmware: mitigate or apply the listed mitigation; dir-816l firmware: mitigate or apply the listed mitigation; dir-645 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2020-25786 being exploited?
CVE-2020-25786 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-25786 affect?
CVE-2020-25786 affects dir-803 firmware, dir-816l firmware, dir-645 firmware. Severity is medium (CVSS 6.1). webinc/js/info.php on D-Link DIR-816L 2.06.B09_BETA and DIR-803 1.04.B02 devices allows XSS via the HTTP Referer header. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. NOTE: this is typically
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