Security readout for executives and security teams
Plain-English summary
CVE-2022-20920 can let a logged-in remote attacker crash and reload affected Cisco IOS or IOS XE devices through SSH. For executives, the main business risk is network interruption, not data theft. The source bundle does not identify specific affected versions or fixed releases.
Executive priority
Treat as a high-priority availability issue for critical network infrastructure, especially routers or switches supporting business operations. Prioritize assets where SSH is reachable beyond tightly controlled admin networks.
Technical view
The flaw is in Cisco IOS and IOS XE SSH handling. Improper resource handling during an exceptional condition can allow an authenticated remote attacker to trigger device reloads by repeatedly interacting with SSH. CVSS 3.1 is 7.7 with high availability impact and no confidentiality or integrity impact.
Likely exposure
Exposure is most relevant where Cisco IOS or IOS XE devices have SSH management reachable by users with valid credentials. Version-specific exposure is not available in the provided bundle.
Exploitation context
The bundle describes authenticated remote exploitation and marks CISA KEV as false. It does not provide evidence of active exploitation, public exploit availability, or observed attacks.
Researcher notes
The key constraint is authentication: the attacker needs valid access, but successful exploitation can reload the device. CWE-755 maps to improper handling of exceptional conditions. The provided data lacks affected version ranges, fixed releases, and exploit telemetry.
Mitigation direction
- Review the Cisco advisory for affected releases and vendor-recommended fixed software.
- Apply Cisco-recommended updates or workarounds where applicable.
- Limit SSH management access to trusted administrative paths where operationally feasible.
- Monitor for unexpected device reloads on potentially affected Cisco devices.
Validation and detection
- Inventory Cisco IOS and IOS XE devices with SSH management enabled.
- Compare device software versions against the Cisco advisory.
- Confirm which accounts can authenticate to SSH management interfaces.
- Review logs for repeated SSH activity followed by device reloads.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-755: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-20920 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H3.14ciscoVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- 20220928 Cisco IOS and IOS XE Software SSH Denial of Service VulnerabilityCVE reference, cisco · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Handling of Exceptional Conditions
Improper Handling of Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.