CVE-2025-45766: poco v1.14.1-release was discovered to contain weak encryption

Routine

HIGH 7.0REMOTEDOWNGRADE

CVE-2025-45766 is a high-severity flaw (CVSS 7.0) affecting poco. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

poco v1.14.1-release was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.0 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-327
Published	2025-08-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pocoproject

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

Am I affected?

Timeline

2025-08-06 20:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

pocoproject poco DOWNGRADE

Affected: 1.14.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.14.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.14.1 (Debian / Ubuntu)

apt-cache madison poco sudo apt install poco=<VERSION_BEFORE_1.14.1> sudo apt-mark hold poco

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

dnf --showduplicates list poco sudo dnf downgrade poco-<VERSION_BEFORE_1.14.1> sudo dnf versionlock add poco

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-2025-45766?

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

Is CVE-2025-45766 being exploited?

CVE-2025-45766 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-2025-45766 affect?

CVE-2025-45766 affects poco. Severity is high (CVSS 7.0). poco v1.14.1-release was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rule

How urgent is CVE-2025-45766?

Priority 30/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-6375 LOW 3.3 UPGRADE A vulnerability was found in poco up to 1.14.1

References

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