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CVE-2024-39921

21
FAUCET Score

CVE-2024-39921 is a timing discrepancy vulnerability affecting specific versions of Fujitsu IPCOM EX2 and VE2 Series devices. This flaw allows an attacker to potentially decrypt encrypted communications by observing timing differences. With a CVSS score of 7.5 (High), it presents a significant risk, as it can be exploited remotely with low attack complexity, leading to a high impact on confidentiality. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= v01l04nf0001, <= v01l06nf0112CPE matchmatch criteria
cpe:2.3:o:fujitsu:ipcom_ve2_ls_100_firmware:*:*:*:*:*:*:*:*
>= v01l04nf0001, <= v01l06nf0112CPE matchmatch criteria
cpe:2.3:o:fujitsu:ipcom_ve2_ls_200_firmware:*:*:*:*:*:*:*:*
>= v01l04nf0001, <= v01l06nf0112CPE matchmatch criteria
cpe:2.3:o:fujitsu:ipcom_ve2_ls_220_firmware:*:*:*:*:*:*:*:*
>= v01l04nf0001, <= v01l06nf0112CPE matchmatch criteria
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus_100_firmware:*:*:*:*:*:*:*:*
>= v01l04nf0001, <= v01l06nf0112CPE matchmatch criteria
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus_200_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 14th percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN29238389
MitigationThird Party Advisory
fujitsu.com / jp/products/network/support/2024/ipcom-04
MitigationVendor Advisory