CVE-2025-31981: HCL BigFix Service Management (SM) Discovery is vulnerable to unenforced encryption due to port 80 (HTTP) bein

Routine

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2025-31981 is a medium-severity flaw (CVSS 5.3) affecting bigfix service management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HCL BigFix Service Management (SM) Discovery is vulnerable to unenforced encryption due to port 80 (HTTP) being open, allowing unencrypted access. An attacker with access to the network traffic can sniff packets from the connection and uncover the data.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 100%)
CISA exploited list	No
Weakness	CWE-319
Published	2026-04-21
Last modified	2026-10-07

Publisher (CNA): HCL Software · Vendor: hcltech

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 15:16 UTCPublished CVE record published
2026-10-07 09:10 UTCUpdated Record last modified

hcltech bigfix service management DOWNGRADE

Affected: 23.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 23.0

1. Check installed version

apt-cache policy bigfix-service-management || rpm -q bigfix-service-management || bigfix-service-management --version

2. No fixed release: DOWNGRADE to a release before 23.0 (Debian / Ubuntu)

apt-cache madison bigfix-service-management sudo apt install bigfix-service-management=<VERSION_BEFORE_23.0> sudo apt-mark hold bigfix-service-management

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

dnf --showduplicates list bigfix-service-management sudo dnf downgrade bigfix-service-management-<VERSION_BEFORE_23.0> sudo dnf versionlock add bigfix-service-management

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-2025-31981?

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

Is CVE-2025-31981 being exploited?

CVE-2025-31981 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-2025-31981 affect?

CVE-2025-31981 affects bigfix service management. Severity is medium (CVSS 5.3). HCL BigFix Service Management (SM) Discovery is vulnerable to unenforced encryption due to port 80 (HTTP) being open, allowing unencrypted access. An attacker with access to the network traffic can sniff packets from the connection and unc

How urgent is CVE-2025-31981?

Priority 24/100. Remotely exploitable, no login, no user action

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References

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