CVE-2025-55619: Reolink v4.54.0.4.20250526 was discovered to contain a hardcoded encryption key and initialization vector

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-55619 is a critical-severity flaw (CVSS 9.8) affecting reolink. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Reolink v4.54.0.4.20250526 was discovered to contain a hardcoded encryption key and initialization vector. An attacker can leverage this vulnerability to decrypt access tokens and web session tokens stored inside the app via reverse engineering.

Why this priority

Critical severity
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	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-321
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-2025-55619?

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

Is CVE-2025-55619 being exploited?

CVE-2025-55619 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-2025-55619 affect?

CVE-2025-55619 affects reolink. Severity is critical (CVSS 9.8). Reolink v4.54.0.4.20250526 was discovered to contain a hardcoded encryption key and initialization vector. An attacker can leverage this vulnerability to decrypt access tokens and web session tokens stored inside the app via reverse enginee

How urgent is CVE-2025-55619?

Priority 53/100. Critical severity; 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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