How severe is CVE-2005-2640?

CVE-2005-2640 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-2640 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-2640?

CVE-2005-2640 primarily affects Neoteris Instant Virtual Extranet. In total, 133 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-2640?

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

When was CVE-2005-2640 published?

CVE-2005-2640 was published on 2005-08-23 and last updated on 2026-06-16.

CVE-2005-2640

CVE-2005-2640 is a medium-severity vulnerability in Neoteris Instant Virtual Extranet with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Neoteris Instant Virtual Extranet
Published: 2005-08-23
Last modified: 2026-06-16

Description

Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and earlier, when using IKE with pre-shared key authentication, allows remote attackers to enumerate valid usernames via an IKE Aggressive Mode packet, which generates a response if the username is valid but does not respond when the username is invalid.

Frequently asked questions

What is CVE-2005-2640?: Behavioral discrepancy information leak in Juniper Netscreen VPN running ScreenOS 5.2.0 and earlier, when using IKE with pre-shared key authentication, allows remote attackers to enumerate valid usernames via an IKE Aggressive Mode packet, which generates a response if the username is valid but does not respond when the username is invalid.
How severe is CVE-2005-2640?: CVE-2005-2640 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2005-2640 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2005-2640?: CVE-2005-2640 primarily affects Neoteris Instant Virtual Extranet. In total, 133 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2005-2640?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2005-2640 published?: CVE-2005-2640 was published on 2005-08-23 and last updated on 2026-06-16.

References

Affected products (133)

cpe:2.3:a:neoteris:instant_virtual_extranet:3.0:*:*:*:*:*:*:*
cpe:2.3:a:neoteris:instant_virtual_extranet:3.1:*:*:*:*:*:*:*
cpe:2.3:a:neoteris:instant_virtual_extranet:3.2:*:*:*:*:*:*:*
cpe:2.3:a:neoteris:instant_virtual_extranet:3.3:*:*:*:*:*:*:*
cpe:2.3:a:neoteris:instant_virtual_extranet:3.3.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.7:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.64:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.66:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.66_r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.73_r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:1.73_r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.0.1_r8:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.1_r6:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.1_r7:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.5:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.5r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.5r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.5r6:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.0:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r3:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r4:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r5:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r6:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r7:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r8:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r9:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r10:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r11:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.6.1r12:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.7.1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.7.1r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.7.1r2:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.7.1r3:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.8:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.8_r1:*:*:*:*:*:*:*
cpe:2.3:o:juniper:netscreen_screenos:2.10_r3:*:*:*:*:*:*:*

More vulnerabilities in Neoteris Instant Virtual Extranet

CVE-2004-0079 — High (CVSS 7.5): The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause…
CVE-2003-0217 — Medium (CVSS 6.8): Cross-site scripting (XSS) vulnerability in Neoteris Instant Virtual Extranet (IVE) 3.01 and earlier allows remote…
CVE-2004-0939 — Medium (CVSS 5.0): changepassword.cgi in Neoteris Instant Virtual Extranet (IVE) 3.x and 4.x, with LDAP authentication or NT domain…
CVE-2004-0081 — Medium (CVSS 5.0): OpenSSL 0.9.6 before 0.9.6d does not properly handle unknown message types, which allows remote attackers to cause a…
CVE-2004-0112 — Medium (CVSS 5.0): The SSL/TLS handshaking code in OpenSSL 0.9.7a, 0.9.7b, and 0.9.7c, when using Kerberos ciphersuites, does not properly…

All CVEs affecting Neoteris Instant Virtual Extranet →