CVE-2018-14533: read_tmp and write_tmp in Inteno IOPSYS allow attackers to gain privileges after writing to /tmp/etc/smb.conf

This month

HIGH 7.8MITIGATE

CVE-2018-14533 is a high-severity flaw (CVSS 7.8) affecting iopsys firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

read_tmp and write_tmp in Inteno IOPSYS allow attackers to gain privileges after writing to /tmp/etc/smb.conf because /var is a symlink to /tmp.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Published	2018-07-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: intenogroup

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

Am I affected?

Timeline

2018-07-31 14:29 UTCPublished CVE record published
2026-06-17 01:41 UTCUpdated Record last modified

intenogroup iopsys firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Inteno’s IOPSYS - (Authenticated) Local Privilege Escalation

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-2018-14533?

iopsys firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-14533 being exploited?

CVE-2018-14533 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-2018-14533 affect?

CVE-2018-14533 affects iopsys firmware. Severity is high (CVSS 7.8). read_tmp and write_tmp in Inteno IOPSYS allow attackers to gain privileges after writing to /tmp/etc/smb.conf because /var is a symlink to /tmp.

How urgent is CVE-2018-14533?

Priority 51/100. High severity; Public exploit reference

Related CVEs

CVE-2018-10123 HIGH 8.8 UPGRADE p910nd on Inteno IOPSYS 2.0 through 4.2.0 allows remote attackers to read, or append data to, arbitrary files

References

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