CVE-2018-7437: An issue was discovered in FreeXL before 1.0.5

Q: How do I fix CVE-2018-7437?

freexl: upgrade to 1.0.5; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-7437 being exploited?

CVE-2018-7437 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-7437 affect?

CVE-2018-7437 affects freexl, debian linux. Severity is high (CVSS 8.8). An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in a memcpy call of the parse_SST function.

Q: How urgent is CVE-2018-7437?

Priority 61/100. High severity; Public exploit reference; On your watchlist

This week

HIGH 8.8WATCHLISTUPGRADEMITIGATE

CVE-2018-7437 is a high-severity flaw (CVSS 8.8) affecting freexl, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in a memcpy call of the parse_SST function.

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-125
Published	2018-02-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · freexl project

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

Am I affected?

Timeline

2018-02-23 21:29 UTCPublished CVE record published
2026-06-17 02:03 UTCUpdated Record last modified

freexl project freexl UPGRADE

Affected: < 1.0.5

Fixed in: 1.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade freexl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freexl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

debian debian linux MITIGATE

Affected: 7.0 · 8.0 · 9.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

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.

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-2018-7437?

freexl: upgrade to 1.0.5; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-7437 being exploited?

CVE-2018-7437 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-2018-7437 affect?

CVE-2018-7437 affects freexl, debian linux. Severity is high (CVSS 8.8). An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in a memcpy call of the parse_SST function.

How urgent is CVE-2018-7437?

Priority 61/100. High severity; Public exploit reference; On your watchlist

Software pages

Debian vulnerabilities

Related CVEs

CVE-2018-7439 HIGH 8.8 UPGRADE MITIGATE An issue was discovered in FreeXL before 1.0.5
CVE-2018-7438 HIGH 8.8 UPGRADE MITIGATE An issue was discovered in FreeXL before 1.0.5
CVE-2018-7436 HIGH 8.8 UPGRADE MITIGATE An issue was discovered in FreeXL before 1.0.5
CVE-2018-7435 HIGH 8.8 UPGRADE MITIGATE An issue was discovered in FreeXL before 1.0.5
CVE-2017-2924 HIGH 8.8 DOWNGRADE MITIGATE An exploitable heap-based buffer overflow vulnerability exists in the read_legacy_biff function of FreeXL 1.0.

References

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