CVE-2021-1566

mediumPriorität · verfolgen · 30EPSS 0.007 · 52. PerzentilEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.67% (52nd) EPSS

CVSS 5.8 · medium

Is it mine?

19 products

Prüfe deine Angriffsfläche

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · bewertet 2026-10-27

A vulnerability in the Cisco Advanced Malware Protection (AMP) for Endpoints integration of Cisco AsyncOS for Cisco Email Security Appliance (ESA) and Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to intercept traffic between an affected device and the AMP servers. This vulnerability is due to improper certificate validation when an affected device establishes TLS connections. A man-in-the-middle attacker could exploit this vulnerability by sending a crafted TLS packet to an affected device. A successful exploit could allow the attacker to spoof a trusted host and then extract sensitive information or alter certain API requests.

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

BehobenCisco Secure Emailcisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
BehobenCisco Secure Web Appliancecisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

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

7.4

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5.8–7.4

v2.05.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USAusnutzbarkeit 8.6 · Auswirkung 4.9

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USAusnutzbarkeit 2.2 · Auswirkung 5.2

v3.17.4highAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · psirt@cisco.com USAusnutzbarkeit 2.2 · Auswirkung 5.2

v3.16.8mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · Cisco PSIRT US

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-295USprimärCWE-296USCWE-296US

betroffene Produkte (19)

Betroffene Produkte und Versionsbereiche.

Cisco Cisco Secure Emailalle Versionencisco_csafUS
Cisco Cisco Secure Web Appliancealle Versionencisco_csafUS
Cisco Cisco Web Security Appliance (WSA)≤ n/aenisa_euvdEU
Cisco Systems Inc. AsyncOS≤ 12.5.3-035fstec_bduRU
Cisco Systems Inc. AsyncOS≤ 11.8.3-021fstec_bduRU
Cisco Systems Inc. AsyncOS12.0.0 → 12.0.3-005fstec_bduRU
Cisco Systems Inc. AsyncOS12.5.0 → 12.5.1-043fstec_bduRU
Cisco Systems Inc. AsyncOS13,5 → 13.5.3-010fstec_bduRU
Cisco Systems Inc. AsyncOS13.0 → 13.0.0-030fstec_bduRU
Cisco Systems Inc. Cisco Email Security Appliancesalle Versionenfstec_bduRU
Cisco Systems Inc. Cisco Web Security Appliancealle Versionenfstec_bduRU
cisco asyncos< 11.8.3-021nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco asyncos< 12.5.3-035nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco asyncos12.0.0 → 12.0.3-005nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco asyncos12.5.0 → 12.5.1-043nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco asyncos13.0 → 13.0.0-030nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco asyncos13.5 → 13.5.3-010nvdUScpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*
cisco email security appliancealle VersionennvdUScpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*
cisco web security appliancealle VersionennvdUScpe:2.3:a:cisco:web_security_appliance:*:*:*:*:*:*:*:*

Advisories (1)

Hersteller- und Ökosystem-Meldungen dazu.

cisco-sa-esa-wsa-cert-vali-n8L97RWCisco Email Security Appliance and Cisco Web Security Appliance Certificate Validation Vulnerability2021-06-16csaf · cisco_csafUS
A vulnerability in the Cisco Advanced Malware Protection (AMP) for Endpoints integration of Cisco AsyncOS for Cisco Email Security Appliance (ESA) and Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to intercept traffic between an affected device and the AMP servers. This vulnerability is due to improper certificate validation when an affected device establishes TLS connections. A man-in-the-middle attacker could exploit this vulnerability by sending a crafted TLS packet to an affected device. A successful exploit could allow the attacker to spoof a trusted host and then extract sensitive information or alter certain API requests. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

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 2021-06-16geändert 2026-06-17

verwandt (1,894)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2026-85102US	—OT kritisch	54.1% (99th)	KEV	2026-09-09
Improper certificate trust validation during VPN negotiation in Check Point Quantum Security Gateway may allow an unauthenticated remote attacker to execute arbitrary code on the G…
CVE-2023-41991US	medium5.5OT kritisch	13.4% (96th)	KEV	2023-09-21
A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple…
CVE-2023-20963US	high7.8OT kritisch	1.47% (74th)	KEV	2023-03-24
In WorkSource, there is a possible parcel mismatch. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed…
CVE-2022-26923US	high9.0OT kritisch	83.5% (100th)	KEV	2022-05-10
Active Directory Domain Services Elevation of Privilege Vulnerability
CVE-2022-20703US	high8.0OT kritisch	9.20% (95th)	KEV	2022-02-10
Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate pr…

+1889 weitere

Referenzen (6)

Externe Belege — Patches, Meldungen, Analysen.

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