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CVE-2012-3923

17
FAUCET Score

CVE-2012-3923 describes a denial-of-service vulnerability in Cisco IOS versions 12.4, 15.0, 15.1, and 15.2's SSLVPN implementation when DTLS is disabled. An authenticated remote attacker can trigger a device crash by establishing a session involving a PPP over ATM (PPPoA) interface and specific outbound ACL configurations. This vulnerability has a CVSS score of 3.5, indicating a medium attack complexity and partial availability impact, but no confidentiality or integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.4CPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.4:*:*:*:*:*:*:*
15.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.0:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.1:*:*:*:*:*:*:*
15.2CPE matchmatch criteria
cpe:2.3:o:cisco:ios:15.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.5LOW

AV:N/AC:M/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 27th percentile among its peer group of 1,637 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/78670
cisco.com / en/US/docs/ios/15_2m_and_t/release/notes/152-1TCAVS.html
Vendor Advisory