What is CVE-2008-0027?

CVE-2008-0027 is a vulnerability in Cisco Unified Callmanager, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2008-01-17.

Is CVE-2008-0027 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Cisco Unified Callmanager

CVE-2008-0027

Heap-based buffer overflow in the Certificate Trust List (CTL) Provider service (CTLProvider.exe) in Cisco Unified Communications Manager (CUCM) 4.2 before 4.2(3)SR3 and 4.3 before 4.3(1)SR1, and CallManager 4.0 and 4.1 before 4.1(3)SR5c, allows remote attackers to cause a denial of service or execute arbitrary code via a long request.

Vulnerability class: Buffer Overflow

Published 2008-01-17 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 10.0 (High). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.571 (99.1th percentile), scored 2026-10-29.

High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.571 · newest: 0.571 · change: 0.000

Affected products

Cisco Unified Callmanager — versions 4.0, 4.1\(3\)sr4, 4.1(3)sr5b
Cisco Unified Communications Manager — versions 4.2, 4.2.3sr2, 4.2.3sr2b

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.securityfocus.com/archive/1/486432/100/0/threaded (mailing-list)
www.vupen.com/english/advisories/2008/0171 (vdb-entry)
securityreason.com/securityalert/3551 (third-party-advisory)
www.cisco.com/en/US/products/products_security_advisory09186a0080932c61.shtml (vendor-advisory, Patch)
dvlabs.tippingpoint.com/advisory/TPTI-08-02
exchange.xforce.ibmcloud.com/vulnerabilities/39704 (vdb-entry)
www.securitytracker.com/id (vdb-entry)
www.securityfocus.com/bid/27313 (vdb-entry)
secunia.com/advisories/28530 (third-party-advisory)

Frequently asked questions

What is CVE-2008-0027?: CVE-2008-0027 is a vulnerability in Cisco Unified Callmanager, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2008-01-17.
Is CVE-2008-0027 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.