CVE-2021-1356

lowPriorität · verfolgen · 17EPSS 0.010 · 62. PerzentilEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.98% (62nd) EPSS

CVSS 3.5 · low

Is it mine?

30 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · bewertet 2026-10-27

Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection.

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

Behoben17.1.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.1.1acisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.1.1scisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.1.1tcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.1.2cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.11.99SWcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.2.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.2.1acisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.2.1rcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.2.1vcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Behoben17.2.2cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

4.3

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–medium · 3.5–4.3

v2.03.5lowAV:N/AC:M/Au:S/C:N/I:N/A:Pprimary · NVD / NIST USAusnutzbarkeit 6.8 · Auswirkung 2.9

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lprimary · NVD / NIST USAusnutzbarkeit 2.8 · Auswirkung 1.4

v3.14.3mediumAV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · ENISA EU

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · psirt@cisco.com USAusnutzbarkeit 2.8 · Auswirkung 1.4

v3.14mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:Usecondary · CVSS-BT (t0sche)

v3.14.3mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Lsecondary · Cisco PSIRT US

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Trackcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-755USprimärCWE-20USCWE-20US

betroffene Produkte (30)

Betroffene Produkte und Versionsbereiche.

Cisco 17.1.1alle Versionencisco_csafUS
Cisco 17.1.1aalle Versionencisco_csafUS
Cisco 17.1.1salle Versionencisco_csafUS
Cisco 17.1.1talle Versionencisco_csafUS
Cisco 17.1.2alle Versionencisco_csafUS
Cisco 17.11.99SWalle Versionencisco_csafUS
Cisco 17.2.1alle Versionencisco_csafUS
Cisco 17.2.1aalle Versionencisco_csafUS
Cisco 17.2.1ralle Versionencisco_csafUS
Cisco 17.2.1valle Versionencisco_csafUS
Cisco 17.2.2alle Versionencisco_csafUS
Cisco Cisco IOS XE Software≤ n/aenisa_euvdEU
Cisco Systems Inc. Cisco IOS XE≤ 16.11fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 17.1fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 16.12fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 17.2fstec_bduRU
Cisco Systems Inc. Cisco IOS XE≤ 3.15Sfstec_bduRU
cisco ios xe= 17.1.1nvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cisco ios xe= 17.1.1anvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
cisco ios xe= 17.1.1snvdUScpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*

20 von 30 angezeigt

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

cisco-sa-xe-webui-dos-z9yqYQAnCisco IOS XE Software Web UI Denial of Service Vulnerabilities2021-03-24csaf · cisco_csafUS
Multiple vulnerabilities in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker with read-only privileges to cause the web UI software to become unresponsive and consume vty line instances, resulting in a denial of service (DoS) condition. These vulnerabilities are due to insufficient error handling in the web UI. An attacker could exploit these vulnerabilities by sending crafted HTTP packets to an affected device. A successful exploit could allow the attacker to cause the web UI software to become unresponsive and consume all available vty lines, preventing new session establishment and resulting in a DoS condition. Manual intervention would be required to regain web UI and vty session functionality. Note: These vulnerabilities do not affect the console connection. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

veröffentlicht 2021-03-24geändert 2026-06-17

verwandt (705)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2026-109619US	high8.1OT kritisch	100.0% (100th)	KEV	2026-10-21
PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The g…
CVE-2026-109618US	critical9.8OT kritisch	100.0% (100th)	KEV	2026-10-21
PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave…
CVE-2024-29748US	high7.8OT kritisch	0.68% (52nd)	KEV	2024-04-05
there is a possible way to bypass due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interacti…
CVE-2022-22265US	high7.8OT kritisch	0.39% (33rd)	KEV	2022-01-10
An improper check or handling of exceptional conditions in NPU driver prior to SMR Jan-2022 Release 1 allows arbitrary memory write and code execution.
CVE-2021-38003US	high8.8OT kritisch	38.6% (99th)	KEV	2021-11-23
Inappropriate implementation in V8 in Google Chrome prior to 95.0.4638.69 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

+700 weitere

Referenzen (6)

Externe Belege — Patches, Meldungen, Analysen.

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