Is CVE-2013-2264 being actively exploited?

CVE-2013-2264 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-2264?

CVE-2013-2264 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2013-2264

MEDIUM · CVSS 5.0EPSS 1.3%EU EUVD

The SIP channel driver in Asterisk Open Source 1.8.x before 1.8.20.2, 10.x before 10.12.2, and 11.x before 11.2.2; Certified Asterisk 1.8.15 before 1.8.15-cert2; Asterisk Business Edition (BE) C.3.x before C.3.8.1; and Asterisk Digiumphones 10.x-digiumphones before 10.12.2-digiumphones exhibits different behavior for invalid INVITE, SUBSCRIBE, and REGISTER transactions depending on whether the user account exists, which allows remote attackers to enumerate account names by (1) reading HTTP status codes, (2) reading additional text in a 403 (aka Forbidden) response, or (3) observing whether certain retransmissions occur.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness (CWE): CWE-200
EPSS score: 1.3% (70th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-2210)
Published: April 1, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-2210 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

asterisk / business edition
asterisk / business edition
asterisk / business edition
asterisk / certified asterisk
asterisk / certified asterisk
asterisk / certified asterisk
asterisk / certified asterisk
asterisk / certified asterisk
asterisk / certified asterisk
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones
asterisk / digiumphones

and 185 more…

References

http://downloads.asterisk.org/pub/security/AST-2013-003.html(Vendor Advisory)
https://issues.asterisk.org/jira/browse/ASTERISK-21013(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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