How severe is CVE-2008-4640?

CVE-2008-4640 has a CVSS 2.0 base score of 3.6, rated low severity.

Is CVE-2008-4640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4640?

CVE-2008-4640 primarily affects Sentex Jhead. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4640?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2008-4640 published?

CVE-2008-4640 was published on 2008-10-21 and last updated on 2026-06-16.

CVE-2008-4640

CVE-2008-4640 is a low-severity vulnerability in Sentex Jhead with a CVSS 2.0 base score of 3.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Low (CVSS 2.0 base score 3.6)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Sentex Jhead
Published: 2008-10-21
Last modified: 2026-06-16

Description

The DoCommand function in jhead.c in Matthias Wandel jhead 2.84 and earlier allows local users to delete arbitrary files via vectors involving a modified input filename in which (1) a final "z" character is replaced by a "t" character or (2) a final "t" character is replaced by a "z" character.

Frequently asked questions

What is CVE-2008-4640?: The DoCommand function in jhead.c in Matthias Wandel jhead 2.84 and earlier allows local users to delete arbitrary files via vectors involving a modified input filename in which (1) a final "z" character is replaced by a "t" character or (2) a final "t" character is replaced by a "z" character.
How severe is CVE-2008-4640?: CVE-2008-4640 has a CVSS 2.0 base score of 3.6, rated low severity.
Is CVE-2008-4640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4640?: CVE-2008-4640 primarily affects Sentex Jhead. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2008-4640 published?: CVE-2008-4640 was published on 2008-10-21 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:a:sentex:jhead:*:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.2:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.3:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.4:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.5:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.6:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.7:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.8:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:1.9:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.0:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.1:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.2:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.3:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.4:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.4-1:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.4-2:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.5:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.6:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.7:*:*:*:*:*:*:*
cpe:2.3:a:sentex:jhead:2.8:*:*:*:*:*:*:*

More vulnerabilities in Sentex Jhead

CVE-2008-4641 — Critical (CVSS 10.0): The DoCommand function in jhead.c in Matthias Wandel jhead 2.84 and earlier allows attackers to execute arbitrary…
CVE-2008-4575 — Medium (CVSS 5.0): Buffer overflow in the DoCommand function in jhead before 2.84 might allow context-dependent attackers to cause a…
CVE-2008-4639 — Medium (CVSS 4.6): jhead.c in Matthias Wandel jhead 2.84 and earlier allows local users to overwrite arbitrary files via a symlink attack…

All CVEs affecting Sentex Jhead →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →