CVE-2018-7435

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the...

8.8 HighFix available

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.14%Up 0.9 points since Apr 14, 2021

What each source reports

NVD Score used 8.8

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: CVE-2018-7435
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.8 MediumAV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: CVE-2018-7435
Updated: 2026-11-02

EUVDEUVD-2018-19166 No score

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: EUVD-2018-19166
Updated: 2026-11-03

GitHub AdvisoriesGHSA-m5h7-xcc6-3xwx 8.8

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the...

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: GHSA-m5h7-xcc6-3xwx
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-125
Updated: 2026-11-02

OSV 8.8

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: CVE-2018-7435
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-7435 8.8

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: DEBIAN-CVE-2018-7435
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

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OSVUBUNTU-CVE-2018-7435 8.8

An issue was discovered in FreeXL before 1.0.5. There is a heap-based buffer over-read in the freexl::destroy_cell function.

Record: UBUNTU-CVE-2018-7435
CVSS 3.0: 8.8 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2018:0569-1 No score

Security update for freexl

This update for freexl fixes the following issues:

freexl was updated to version 1.0.5:

No changelog provided by upstream
Various heapoverflows in 1.0.4 have been fixed:
- CVE-2018-7439: heap-buffer-overflow in freexl.c:3912 read_mini_biff_next_record (boo#1082774)
- CVE-2018-7438: heap-buffer-overflow in freexl.c:383 parse_unicode_string (boo#1082775)
- CVE-2018-7437: heap-buffer-overflow in freexl.c:1866 parse_SST(boo#1082776)
- CVE-2018-7436: heap-buffer-overflow in freexl.c:1805 parse_SST parse_SST (boo#1082777)
- CVE-2018-7435: heap-buffer-overflow in freexl::destroy_cell (boo#1082778)

Record: openSUSE-SU-2018:0569-1
Updated: 2026-11-02

OSVopenSUSE-SU-2018:0570-1 No score

Security update for freexl

This update for freexl fixes the following issues:

freexl was updated to version 1.0.5:

No changelog provided by upstream
Various heapoverflows in 1.0.4 have been fixed:
- CVE-2018-7439: heap-buffer-overflow in freexl.c:3912 read_mini_biff_next_record (boo#1082774)
- CVE-2018-7438: heap-buffer-overflow in freexl.c:383 parse_unicode_string (boo#1082775)
- CVE-2018-7437: heap-buffer-overflow in freexl.c:1866 parse_SST(boo#1082776)
- CVE-2018-7436: heap-buffer-overflow in freexl.c:1805 parse_SST parse_SST (boo#1082777)
- CVE-2018-7435: heap-buffer-overflow in freexl::destroy_cell (boo#1082778)

Record: openSUSE-SU-2018:0570-1
Updated: 2026-11-02

OSVopenSUSE-SU-2024:10771-1 No score

freexl-devel-1.0.6-1.3 on GA media

These are all security issues fixed in the freexl-devel-1.0.6-1.3 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:10771-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`freexl` Debian:12	before 1.0.5-1	1.0.5-1
`freexl` Debian:13	before 1.0.5-1	1.0.5-1
`freexl` Debian:14	before 1.0.5-1	1.0.5-1
`freexl` Debian:7 From an advisory covering 5 CVEs	before 1.0.0b-1+deb7u5, plus listed versions 1.0.0b-11.0.0b-1+deb7u11.0.0b-1+deb7u21.0.0b-1+deb7u31.0.0b-1+deb7u4	1.0.0b-1+deb7u5
`freexl` Debian:8 From an advisory covering 5 CVEs	before 1.0.0g-1+deb8u5, plus listed versions 1.0.0g-1+deb8u11.0.0g-1+deb8u21.0.0g-1+deb8u31.0.0g-1+deb8u4	1.0.0g-1+deb8u5
`freexl` Debian:9 From an advisory covering 5 CVEs	before 1.0.2-2+deb9u2, plus listed versions 1.0.2-21.0.2-2+deb9u1	1.0.2-2+deb9u2
`freexl` Ubuntu:14.04:LTS	before 1.0.0g-1ubuntu0.14.04.3, plus listed versions 1.0.0d-11.0.0f-11.0.0f-21.0.0g-11.0.0g-1ubuntu0.14.04.11.0.0g-1ubuntu0.14.04.2	1.0.0g-1ubuntu0.14.04.3
`freexl` Ubuntu:16.04:LTS	before 1.0.2-1ubuntu0.1, plus listed versions 1.0.2-1	1.0.2-1ubuntu0.1
`freexl` SUSE:Package Hub 12 From an advisory covering 5 CVEs	before 1.0.5-8.1	1.0.5-8.1
`freexl` openSUSE:Tumbleweed From an advisory covering 7 CVEs	before 1.0.6-1.3	1.0.6-1.3

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-7435 is a high vulnerability (CVSS 8.8) in Freexl Project Freexl, published February 23, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.14%, the 82nd percentile. Fixed in freexl 1.0.5-1.

References

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