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CVE-2007-3923

21
FAUCET Score

CVE-2007-3923 describes a denial-of-service vulnerability in Cisco Wide Area Application Services (WAAS) versions 4.0.7 and 4.0.9, specifically impacting the CIFS optimization feature when Edge Services are configured. This flaw affects Cisco WAE appliances and the NM-WAE-502 network module. The vulnerability carries a CVSS score of 7.8, indicating high severity. It can be exploited remotely without authentication via a low-complexity attack involving a flood of TCP SYN packets to ports 139 or 445, leading to a complete loss of service. Despite its severity, there is no evidence of active exploitation, nor is public exploit code available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, suggesting a low level of public attention.

Impacted Technologies

VendorProductVersion(s)CPE
4.0.7CPE matchmatch criteria
cpe:2.3:a:cisco:wide_area_application_services:4.0.7:*:*:*:*:*:*:*
4.0.9CPE matchmatch criteria
cpe:2.3:a:cisco:wide_area_application_services:4.0.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.98%
Probability of exploitation in next 30 days
EPSS Percentile
78.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0198 is in the 62nd percentile among its peer group of 51,485 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

secunia.com / advisories/26122
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/35477
cisco.com / warp/public/707/cisco-sa-20070718-waas.shtml
Patch
osvdb.org / 36120
securityfocus.com / bid/24956
Patch
securitytracker.com / id
Patch
vupen.com / english/advisories/2007/2572