CVE-2025-57636: OS Command injection vulnerability in D-Link C1 2020-02-21

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MEDIUM 6.5REMOTEMITIGATE

CVE-2025-57636 is a medium-severity flaw (CVSS 6.5) affecting di-7100g firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OS Command injection vulnerability in D-Link C1 2020-02-21. The sub_47F028 function in jhttpd contains a command injection vulnerability via the HTTP parameter "time".

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-09-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-09-23 20:15 UTCPublished CVE record published
2026-06-17 09:43 UTCUpdated Record last modified

dlink di-7100g firmware MITIGATE

Affected: 2020-02-21c1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2020-02-21c1

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 source NVD · 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-2025-57636?

di-7100g firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-57636 being exploited?

CVE-2025-57636 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-2025-57636 affect?

CVE-2025-57636 affects di-7100g firmware. Severity is medium (CVSS 6.5). OS Command injection vulnerability in D-Link C1 2020-02-21. The sub_47F028 function in jhttpd contains a command injection vulnerability via the HTTP parameter "time".

How urgent is CVE-2025-57636?

Priority 49/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2025-57637 HIGH 7.5 MITIGATE Buffer overflow vulnerability in D-Link DI-7100G 2020-02-21 in the sub_451754 function of the jhttpd service i

References

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