CVE-2010-2836 — Memory leak in the SSL VPN feature in Cisco IOS 12.4, 15.0, and 15.1, when HTTP port redirection is enabled, allows remote attackers to cause a denial of service (memory consumption) by improperly disconnecting SSL sessions, leading to connections that remain in the CLOSE-WAIT state, aka Bug ID CSCtg21685

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HIGH

Memory leak in the SSL VPN feature in Cisco IOS 12.4, 15.0, and 15.1, when HTTP port redirection is enabled, allows remote attackers to cause a denial of service (memory consumption) by improperly disconnecting SSL sessions, leading to connections that remain in the CLOSE-WAIT state, aka Bug ID CSCtg21685

Published Sep 23, 2010

7.8

HIGH

CVSS 2.0

EPSS 1.76%

Description

Memory leak in the SSL VPN feature in Cisco IOS 12.4, 15.0, and 15.1, when HTTP port redirection is enabled, allows remote attackers to cause a denial of service (memory consumption) by improperly disconnecting SSL sessions, leading to connections that remain in the CLOSE-WAIT state, aka Bug ID CSCtg21685.

Remediation

No remediation recorded yet.

Metrics

1.76% 0.01763

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01763

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.76% (0.01763)	77.21th	v5 (v2026.06.15)
Jun 15, 2026	1.76% (0.01763)	75.05th	v5 (v2026.06.15)
Mar 17, 2025	0.43% (0.00427)	60.26th	v4 (v2025.03.14)
Dec 12, 2024	0.16% (0.00161)	54.06th	v3 (v2023.03.01)
Apr 25, 2024	0.14% (0.00137)	48.64th	v3 (v2023.03.01)
Mar 15, 2024	0.13% (0.00127)	46.29th	v3 (v2023.03.01)
Feb 8, 2024	0.11% (0.00115)	43.86th	v3 (v2023.03.01)
Mar 7, 2023	0.16% (0.00161)	50.92th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Sep 17, 2022	1.05% (0.01055)	50.47th	v2 (v2022.01.01)
Apr 1, 2022	1.05% (0.01055)	48.43th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)

Weaknesses (1)

CWE-399

References (1)

http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a312.shtml
vendor-advisoryx_refsource_CISCOPatchVendor Advisory

Link	Providers	Tags
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b4a312.shtml		vendor-advisoryx_refsource_CISCOPatchVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Sep 23, 2010

Updated Sep 16, 2024

Reserved Jul 23, 2010

Link CVE-2010-2836

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2010-2836

Red Hat

Severity n/a

Public date n/a

Links CVE-2010-2836