CVE-2009-2726

highpriority · track · 33EPSS 0.065 · 94 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

6.52% (94th) EPSS

CVSS 7.8 · high

Is it mine?

9 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

The SIP channel driver in Asterisk Open Source 1.2.x before 1.2.34, 1.4.x before 1.4.26.1, 1.6.0.x before 1.6.0.12, and 1.6.1.x before 1.6.1.4; Asterisk Business Edition A.x.x, B.x.x before B.2.5.9, C.2.x before C.2.4.1, and C.3.x before C.3.1; and Asterisk Appliance s800i 1.2.x before 1.3.0.3 does not use a maximum width when invoking sscanf style functions, which allows remote attackers to cause a denial of service (stack memory consumption) via SIP packets containing large sequences of ASCII decimal characters, as demonstrated via vectors related to (1) the CSeq value in a SIP header, (2) large Content-Length value, and (3) SDP.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v2.06.6mediumAV:N/AC:L/Au:N/C:N/I:N/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimary

affected products (9)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
digium asterisk< b.2.5.9nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk1.2.0 → 1.2.34nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk1.4.0 → 1.4.26.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk1.6.0 → 1.6.0.12nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk1.6.1 → 1.6.1.4nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asteriskc.2.0 → c.2.4.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asteriskc.3.0 → c.3.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium s800i firmware1.2.0 → 1.3.0.3nvdUScpe:2.3:o:digium:s800i_firmware:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-08-12modified 2026-06-16

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+3263 more

references (14)

External citations — patches, advisories, analysis.

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