CVE-2025-70314: webfsd 1.21 is vulnerable to a Buffer Overflow via a crafted request

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-70314 is a critical-severity flaw (CVSS 9.8) affecting webfsd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

webfsd 1.21 is vulnerable to a Buffer Overflow via a crafted request. This is due to the filename variable

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-02-12
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ourway

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

Am I affected?

Timeline

2026-02-12 20:16 UTCPublished CVE record published
2026-06-17 10:03 UTCUpdated Record last modified

ourway webfsd DOWNGRADE

Affected: 1.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.21

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.21 (Debian / Ubuntu)

apt-cache madison webfsd sudo apt install webfsd=<VERSION_BEFORE_1.21> sudo apt-mark hold webfsd

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

dnf --showduplicates list webfsd sudo dnf downgrade webfsd-<VERSION_BEFORE_1.21> sudo dnf versionlock add webfsd

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · php-pecl-yac · FIXED · 3.0.2-1.fc46 · FEDORA-2026-0322a78385 · source

sudo dnf upgrade --advisory=FEDORA-2026-0322a78385

Fedora ELN · openldap · FIXED · 2.6.16-1.eln159 · FEDORA-2026-4b30c86326 · source

sudo dnf upgrade --advisory=FEDORA-2026-4b30c86326

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-2025-70314?

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

Is CVE-2025-70314 being exploited?

CVE-2025-70314 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-2025-70314 affect?

CVE-2025-70314 affects webfsd. Severity is critical (CVSS 9.8). webfsd 1.21 is vulnerable to a Buffer Overflow via a crafted request. This is due to the filename variable

How urgent is CVE-2025-70314?

Priority 58/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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