Unspecified Cisco Catalyst Switches allow remote attackers to cause a denial of service (device crash) via an IP packet with the same source
Unspecified Cisco Catalyst Switches allow remote attackers to cause a denial of service (device crash) via an IP packet with the same source and destination IPs and ports, and with the SYN flag set (aka LanD). NOTE: the provenance of this issue is unknown; the details are obtained solely from the BID.
- Published
- Dec 15, 2005
- Updated
- Jun 16, 2026
- EPSS
- 2.1% · 80th percentile
- CWE
- —
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Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| cisco | catalyst | cpe:2.3:h:cisco:catalyst |
| cisco | catalyst 1200 series | cpe:2.3:h:cisco:catalyst_1200_series |
| cisco | catalyst 1900 series | cpe:2.3:h:cisco:catalyst_1900_series |
| cisco | catalyst 2800 series | cpe:2.3:h:cisco:catalyst_2800_series |
| cisco | catalyst 2820 | cpe:2.3:h:cisco:catalyst_2820 |
| cisco | catalyst 2900 | cpe:2.3:h:cisco:catalyst_2900 |
| cisco | catalyst 2901 | cpe:2.3:h:cisco:catalyst_2901 |
| cisco | catalyst 2902 | cpe:2.3:h:cisco:catalyst_2902 |
| cisco | catalyst 2920 | cpe:2.3:h:cisco:catalyst_2920 |
| cisco | catalyst 2926 | cpe:2.3:h:cisco:catalyst_2926 |
| cisco | catalyst 2926f | cpe:2.3:h:cisco:catalyst_2926f |
| cisco | catalyst 2926gl | cpe:2.3:h:cisco:catalyst_2926gl |
and 59 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- cisco catalyst4.5_(10)
- cisco catalystsup2plus
- cisco catalystsup3
- cisco catalyst 1200 seriesall versions
- cisco catalyst 1900 seriesall versions
- cisco catalyst 1900 series9.0_0.07
- cisco catalyst 2800 seriesall versions
- cisco catalyst 2820all versions
- cisco catalyst 28209.0_0.07
- cisco catalyst 2900all versions
- cisco catalyst 2900lre_xl
- cisco catalyst 2900xl
- cisco catalyst 2901all versions
- cisco catalyst 2902all versions
- cisco catalyst 2920all versions
- cisco catalyst 2926all versions
- cisco catalyst 2926fall versions
- cisco catalyst 2926glall versions
- cisco catalyst 2926gsall versions
- cisco catalyst 2926tall versions
Same product
cisco: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-0620Cisco ACE Application Control Engine Module for Catalyst 6500 Switches and 7600 Routers before A2(1.1) uses default (1) usernames and (2) pa41Plan
- CVE-2009-1166The administrative web interface on the Cisco Wireless LAN Controller (WLC) platform 4.x before 4.2.205.0 and 5.x before 5.2.191.0, as used 31Monitor
- CVE-2005-1942Cisco switches that support 802.1x security allow remote attackers to bypass port security and gain access to the VLAN via spoofed Cisco Dis30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- C · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- C
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.