CVE-2025-55621: An Insecure Direct Object Reference (IDOR) vulnerability in Reolink v4.54.0.4.20250526 allows unauthorized att

This week

MEDIUM 6.5REMOTEDOWNGRADE

CVE-2025-55621 is a medium-severity flaw (CVSS 6.5) affecting reolink. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Insecure Direct Object Reference (IDOR) vulnerability in Reolink v4.54.0.4.20250526 allows unauthorized attackers to access and download other users' profile photos via a crafted URL. NOTE: this is disputed by the Supplier because it is intentional behavior; the photos are part of a social platform on which users expect to find one another.

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	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-639
Published	2025-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: reolink

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

Am I affected?

Timeline

2025-08-22 17:15 UTCPublished CVE record published
2026-06-17 09:41 UTCUpdated Record last modified

reolink reolink DOWNGRADE

Affected: 4.54.0.4.20250526

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.54.0.4.20250526

1. Check installed version

apt-cache policy reolink || rpm -q reolink || reolink --version

2. No fixed release: DOWNGRADE to a release before 4.54.0.4.20250526 (Debian / Ubuntu)

apt-cache madison reolink sudo apt install reolink=<VERSION_BEFORE_4.54.0.4.20250526> sudo apt-mark hold reolink

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list reolink sudo dnf downgrade reolink-<VERSION_BEFORE_4.54.0.4.20250526> sudo dnf versionlock add reolink

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-55621?

reolink: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-55621 being exploited?

CVE-2025-55621 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-2025-55621 affect?

CVE-2025-55621 affects reolink. Severity is medium (CVSS 6.5). An Insecure Direct Object Reference (IDOR) vulnerability in Reolink v4.54.0.4.20250526 allows unauthorized attackers to access and download other users' profile photos via a crafted URL. NOTE: this is disputed by the Supplier because it is

How urgent is CVE-2025-55621?

Priority 36/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-56802 MEDIUM 5.1 DOWNGRADE The Reolink desktop application uses a hard-coded and predictable AES encryption key to encrypt user configura
CVE-2025-56801 MEDIUM 5.1 DOWNGRADE The Reolink Desktop Application 8.18.12 contains hardcoded credentials as the Initialization Vector (IV) in it
CVE-2025-56800 MEDIUM 5.1 DOWNGRADE Reolink desktop application 8.18.12 contains a vulnerability in its local authentication mechanism
CVE-2025-56799 MEDIUM 6.5 DOWNGRADE Reolink desktop application 8.18.12 contains a command injection vulnerability in its scheduled cache-clearing
CVE-2025-55625 MEDIUM 6.3 DOWNGRADE An open redirect vulnerability in Reolink v4.54.0.4.20250526 allows attackers to redirect users to a malicious

References

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