How severe is CVE-2024-39921?

CVE-2024-39921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2024-39921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-39921?

CVE-2024-39921 primarily affects Fujitsu Ipcom Ve2 Ls 100 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-39921?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-39921 have an EU (EUVD) identifier?

Yes. CVE-2024-39921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38301.

When was CVE-2024-39921 published?

CVE-2024-39921 was published on 2024-09-04 and last updated on 2026-06-17.

CVE-2024-39921

CVE-2024-39921 is a high-severity vulnerability in Fujitsu Ipcom Ve2 Ls 100 Firmware with a CVSS 3.x base score of 7.5. 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-203.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-38301
Weakness: CWE-203
Affected product: Fujitsu Ipcom Ve2 Ls 100 Firmware
Published: 2024-09-04
Last modified: 2026-06-17

Description

Observable timing discrepancy issue exists in IPCOM EX2 Series V01L02NF0001 to V01L06NF0401, V01L20NF0001 to V01L20NF0401, V02L20NF0001 to V02L21NF0301, and IPCOM VE2 Series V01L04NF0001 to V01L06NF0112. If this vulnerability is exploited, some of the encrypted communication may be decrypted by an attacker who can obtain the contents of the communication.

Frequently asked questions

What is CVE-2024-39921?: Observable timing discrepancy issue exists in IPCOM EX2 Series V01L02NF0001 to V01L06NF0401, V01L20NF0001 to V01L20NF0401, V02L20NF0001 to V02L21NF0301, and IPCOM VE2 Series V01L04NF0001 to V01L06NF0112. If this vulnerability is exploited, some of the encrypted communication may be decrypted by an attacker who can obtain the contents of the communication.
How severe is CVE-2024-39921?: CVE-2024-39921 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2024-39921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-39921?: CVE-2024-39921 primarily affects Fujitsu Ipcom Ve2 Ls 100 Firmware. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-39921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-39921 have an EU (EUVD) identifier?: Yes. CVE-2024-39921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-38301.
When was CVE-2024-39921 published?: CVE-2024-39921 was published on 2024-09-04 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:o:fujitsu:ipcom_ve2_ls_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus_220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus2_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_ls_plus2_220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_sc_plus_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_sc_plus_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ve2_sc_plus_220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_in_3200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_in_3500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_lb_3200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_lb_3500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_sc_3200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_sc_3500_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_dc_3200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:fujitsu:ipcom_ex2_dc_3500_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Fujitsu Ipcom Ve2 Ls 100 Firmware

CVE-2022-29516 — Critical (CVSS 9.8): The web console of FUJITSU Network IPCOM series (IPCOM EX2 IN(3200, 3500), IPCOM EX2 LB(1100, 3200, 3500), IPCOM EX2…

All CVEs affecting Fujitsu Ipcom Ve2 Ls 100 Firmware →

Other CWE-203 (Observable Discrepancy) vulnerabilities

CVE-2019-25337 — Critical (CVSS 9.8): OwnCloud 8.1.8 contains a username enumeration vulnerability that allows remote attackers to discover user accounts by…
CVE-2026-23519 — Critical (CVSS 9.8): RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in…
CVE-2025-27667 — Critical (CVSS 9.8): Vasion Print (formerly PrinterLogic) before Virtual Appliance Host 22.0.843 Application 20.0.1923 allows Administrative…
CVE-2024-25714 — Critical (CVSS 9.8): In Rhonabwy through 1.1.13, HMAC signature verification uses a strcmp function that is vulnerable to side-channel…
CVE-2024-25191 — Critical (CVSS 9.8): php-jwt 1.0.0 uses strcmp (which is not constant time) to verify authentication, which makes it easier to bypass…
CVE-2024-25190 — Critical (CVSS 9.8): l8w8jwt 2.2.1 uses memcmp (which is not constant time) to verify authentication, which makes it easier to bypass…

Browse all CWE-203 (Observable Discrepancy) vulnerabilities →