Cisco IOS XE Software TLS Memory Exhaustion Denial of Service Vulnerability

🗓️ 25 Mar 2026 16:00:00Reported by CiscoType

cisco

cisco🔗 tools.cisco.com👁 20 Views

Cisco IOS XE TLS memory exhaustion DoS enables attacker to exhaust memory and cause reloads.

Reporter	Title	Published	Views	Family All 11
bdu_fstec	The vulnerability of the Cisco IOS XE operating system’s TLS library allows attackers to trigger memory exhaustion or service failure.	13 May 202600:00	–	bdu_fstec
circl	CVE-2026-20004	25 Mar 202618:51	–	circl
cnnvd	Cisco IOS XE Software 安全漏洞	25 Mar 202600:00	–	cnnvd
cve	CVE-2026-20004	25 Mar 202616:04	–	cve
cvelist	CVE-2026-20004	25 Mar 202616:04	–	cvelist
euvd	EUVD-2026-15426	25 Mar 202618:31	–	euvd
ncsc	Vulnerabilities fixed in Cisco IOS XE Software	26 Mar 202609:50	–	ncsc
nvd	CVE-2026-20004	25 Mar 202616:16	–	nvd
ptsecurity	PT-2026-27787	25 Mar 202600:00	–	ptsecurity
redhatcve	CVE-2026-20004	26 Mar 202617:00	–	redhatcve

Vulners

Node

cisco ios_xeMatch16.9.1

OR

cisco ios_xeMatch16.9.2

OR

cisco ios_xeMatch16.9.1a

OR

cisco ios_xeMatch16.9.1b

OR

cisco ios_xeMatch16.9.1s

OR

cisco ios_xeMatch16.9.1c

OR

cisco ios_xeMatch16.9.1d

OR

cisco ios_xeMatch16.9.3

OR

cisco ios_xeMatch16.9.2a

OR

cisco ios_xeMatch16.9.2s

OR

cisco ios_xeMatch16.9.3h

OR

cisco ios_xeMatch16.9.4

OR

cisco ios_xeMatch16.9.3s

OR

cisco ios_xeMatch16.9.3a

OR

cisco ios_xeMatch16.9.4c

OR

cisco ios_xeMatch16.9.5

OR

cisco ios_xeMatch16.9.5f

OR

cisco ios_xeMatch16.9.6

OR

cisco ios_xeMatch16.9.7

OR

cisco ios_xeMatch16.9.8

OR

cisco ios_xeMatch16.9.8a

OR

cisco ios_xeMatch16.9.8b

OR

cisco ios_xeMatch16.10.1

OR

cisco ios_xeMatch16.10.1a

OR

cisco ios_xeMatch16.10.1b

OR

cisco ios_xeMatch16.10.1s

OR

cisco ios_xeMatch16.10.1c

OR

cisco ios_xeMatch16.10.1e

OR

cisco ios_xeMatch16.10.1d

OR

cisco ios_xeMatch16.10.2

OR

cisco ios_xeMatch16.10.1f

OR

cisco ios_xeMatch16.10.1g

OR

cisco ios_xeMatch16.10.3

OR

cisco ios_xeMatch16.11.1

OR

cisco ios_xeMatch16.11.1a

OR

cisco ios_xeMatch16.11.1b

OR

cisco ios_xeMatch16.11.2

OR

cisco ios_xeMatch16.11.1s

OR

cisco ios_xeMatch16.11.1c

OR

cisco ios_xeMatch16.12.1

OR

cisco ios_xeMatch16.12.1s

OR

cisco ios_xeMatch16.12.1a

OR

cisco ios_xeMatch16.12.1c

OR

cisco ios_xeMatch16.12.1w

OR

cisco ios_xeMatch16.12.2

OR

cisco ios_xeMatch16.12.1y

OR

cisco ios_xeMatch16.12.2a

OR

cisco ios_xeMatch16.12.3

OR

cisco ios_xeMatch16.12.8

OR

cisco ios_xeMatch16.12.2s

OR

cisco ios_xeMatch16.12.1x

OR

cisco ios_xeMatch16.12.1t

OR

cisco ios_xeMatch16.12.2t

OR

cisco ios_xeMatch16.12.4

OR

cisco ios_xeMatch16.12.3s

OR

cisco ios_xeMatch16.12.1z

OR

cisco ios_xeMatch16.12.3a

OR

cisco ios_xeMatch16.12.4a

OR

cisco ios_xeMatch16.12.5

OR

cisco ios_xeMatch16.12.6

OR

cisco ios_xeMatch16.12.1z1

OR

cisco ios_xeMatch16.12.5a

OR

cisco ios_xeMatch16.12.5b

OR

cisco ios_xeMatch16.12.1z2

OR

cisco ios_xeMatch16.12.6a

OR

cisco ios_xeMatch16.12.7

OR

cisco ios_xeMatch16.12.9

OR

cisco ios_xeMatch16.12.10

OR

cisco ios_xeMatch16.12.10a

OR

cisco ios_xeMatch16.12.11

OR

cisco ios_xeMatch16.12.12

OR

cisco ios_xeMatch16.12.13

OR

cisco ios_xeMatch16.12.14

OR

cisco ios_xeMatch16.12.15

OR

cisco ios_xeMatch17.1.1

OR

cisco ios_xeMatch17.1.1a

OR

cisco ios_xeMatch17.1.1s

OR

cisco ios_xeMatch17.1.2

OR

cisco ios_xeMatch17.1.1t

OR

cisco ios_xeMatch17.1.3

OR

cisco ios_xeMatch17.2.1

OR

cisco ios_xeMatch17.2.1r

OR

cisco ios_xeMatch17.2.1a

OR

cisco ios_xeMatch17.2.1v

OR

cisco ios_xeMatch17.2.2

OR

cisco ios_xeMatch17.2.3

OR

cisco ios_xeMatch17.3.1

OR

cisco ios_xeMatch17.3.2

OR

cisco ios_xeMatch17.3.3

OR

cisco ios_xeMatch17.3.1a

OR

cisco ios_xeMatch17.3.1w

OR

cisco ios_xeMatch17.3.2a

OR

cisco ios_xeMatch17.3.1x

OR

cisco ios_xeMatch17.3.1z

OR

cisco ios_xeMatch17.3.3a

OR

cisco ios_xeMatch17.3.4

OR

cisco ios_xeMatch17.3.5

OR

cisco ios_xeMatch17.3.4a

OR

cisco ios_xeMatch17.3.6

OR

cisco ios_xeMatch17.3.4b

OR

cisco ios_xeMatch17.3.4c

OR

cisco ios_xeMatch17.3.5a

OR

cisco ios_xeMatch17.3.5b

OR

cisco ios_xeMatch17.3.7

OR

cisco ios_xeMatch17.3.8

OR

cisco ios_xeMatch17.3.8a

OR

cisco ios_xeMatch17.4.1

OR

cisco ios_xeMatch17.4.2

OR

cisco ios_xeMatch17.4.1a

OR

cisco ios_xeMatch17.4.1b

OR

cisco ios_xeMatch17.4.1c

OR

cisco ios_xeMatch17.4.2a

OR

cisco ios_xeMatch17.5.1

OR

cisco ios_xeMatch17.5.1a

OR

cisco ios_xeMatch17.5.1b

OR

cisco ios_xeMatch17.5.1c

OR

cisco ios_xeMatch17.6.1

OR

cisco ios_xeMatch17.6.2

OR

cisco ios_xeMatch17.6.1w

OR

cisco ios_xeMatch17.6.1a

OR

cisco ios_xeMatch17.6.1x

OR

cisco ios_xeMatch17.6.3

OR

cisco ios_xeMatch17.6.1y

OR

cisco ios_xeMatch17.6.1z

OR

cisco ios_xeMatch17.6.3a

OR

cisco ios_xeMatch17.6.4

OR

cisco ios_xeMatch17.6.1z1

OR

cisco ios_xeMatch17.6.5

OR

cisco ios_xeMatch17.6.6

OR

cisco ios_xeMatch17.6.6a

OR

cisco ios_xeMatch17.6.5a

OR

cisco ios_xeMatch17.6.7

OR

cisco ios_xeMatch17.6.8

OR

cisco ios_xeMatch17.6.8a

OR

cisco ios_xeMatch17.7.1

OR

cisco ios_xeMatch17.7.1a

OR

cisco ios_xeMatch17.7.1b

OR

cisco ios_xeMatch17.7.2

OR

cisco ios_xeMatch17.10.1

OR

cisco ios_xeMatch17.10.1a

OR

cisco ios_xeMatch17.10.1b

OR

cisco ios_xeMatch17.8.1

OR

cisco ios_xeMatch17.8.1a

OR

cisco ios_xeMatch17.9.1

OR

cisco ios_xeMatch17.9.1w

OR

cisco ios_xeMatch17.9.2

OR

cisco ios_xeMatch17.9.1a

OR

cisco ios_xeMatch17.9.1x

OR

cisco ios_xeMatch17.9.1y

OR

cisco ios_xeMatch17.9.3

OR

cisco ios_xeMatch17.9.2a

OR

cisco ios_xeMatch17.9.1x1

OR

cisco ios_xeMatch17.9.3a

OR

cisco ios_xeMatch17.9.4

OR

cisco ios_xeMatch17.9.1y1

OR

cisco ios_xeMatch17.9.5

OR

cisco ios_xeMatch17.9.4a

OR

cisco ios_xeMatch17.9.5a

OR

cisco ios_xeMatch17.9.5b

OR

cisco ios_xeMatch17.9.6

OR

cisco ios_xeMatch17.9.5c

OR

cisco ios_xeMatch17.9.5d

OR

cisco ios_xeMatch17.9.6a

OR

cisco ios_xeMatch17.9.6b

OR

cisco ios_xeMatch17.9.5e

OR

cisco ios_xeMatch17.9.5f

OR

cisco ios_xeMatch17.11.1

OR

cisco ios_xeMatch17.11.1a

OR

cisco ios_xeMatch17.12.1

OR

cisco ios_xeMatch17.12.1w

OR

cisco ios_xeMatch17.12.1a

OR

cisco ios_xeMatch17.12.1x

OR

cisco ios_xeMatch17.12.2

OR

cisco ios_xeMatch17.12.3

OR

cisco ios_xeMatch17.12.2a

OR

cisco ios_xeMatch17.12.1y

OR

cisco ios_xeMatch17.12.1z

OR

cisco ios_xeMatch17.12.4

OR

cisco ios_xeMatch17.12.3a

OR

cisco ios_xeMatch17.12.1z1

OR

cisco ios_xeMatch17.12.1z2

OR

cisco ios_xeMatch17.12.4a

OR

cisco ios_xeMatch17.12.4b

OR

cisco ios_xeMatch17.12.1z3

OR

cisco ios_xeMatch17.12.1z4

OR

cisco ios_xeMatch17.12.1z5

OR

cisco ios_xeMatch17.12.1z6

OR

cisco ios_xeMatch17.13.1

OR

cisco ios_xeMatch17.13.1a

OR

cisco ios_xeMatch17.14.1

OR

cisco ios_xeMatch17.14.1a

OR

cisco ios_xeMatch17.15.1

OR

cisco ios_xeMatch17.15.1w

OR

cisco ios_xeMatch17.15.1a

OR

cisco ios_xeMatch17.15.1b

OR

cisco ios_xeMatch17.15.1x

OR

cisco ios_xeMatch17.15.1z

OR

cisco ios_xeMatch17.15.1y

OR

cisco ios_xeMatch17.16.1

OR

cisco ios_xeMatch17.16.1a

Source	Link
sec	www.sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-tls-dos-TVgLDEZL

25 Mar 2026 16:00Current

5.8Medium risk

Vulners AI Score5.8

EPSS0.00179

Cisco IOS XE TLS vulnerability memory exhaustion denial of service unauthenticated attacker adjacent attacker Extensible Authentication Protocol