How severe is CVE-2000-0268?

CVE-2000-0268 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2000-0268 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0268?

CVE-2000-0268 primarily affects Cisco Accesspath. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0268?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2000-0268 published?

CVE-2000-0268 was published on 2000-04-20 and last updated on 2026-06-16.

CVE-2000-0268

CVE-2000-0268 is a medium-severity vulnerability in Cisco Accesspath with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Accesspath
Published: 2000-04-20
Last modified: 2026-06-16

Description

Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.

Frequently asked questions

What is CVE-2000-0268?: Cisco IOS 11.x and 12.x allows remote attackers to cause a denial of service by sending the ENVIRON option to the Telnet daemon before it is ready to accept it, which causes the system to reboot.
How severe is CVE-2000-0268?: CVE-2000-0268 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2000-0268 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0268?: CVE-2000-0268 primarily affects Cisco Accesspath. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0268?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0268 published?: CVE-2000-0268 was published on 2000-04-20 and last updated on 2026-06-16.

References

Affected products (26)

cpe:2.3:o:cisco:ios:11.3aa:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xd:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xf:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(2\)xg:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(3\)t2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\)s:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(4\)t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(5\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(6\):*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0\(7\)t:*:*:*:*:*:*:*
cpe:2.3:a:cisco:accesspath:ls-3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:accesspath:ts-3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:accesspath:vs-3:*:*:*:*:*:*:*
cpe:2.3:a:cisco:as5200:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:as5300:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:as5800:*:*:*:*:*:*:*:*
cpe:2.3:a:cisco:system_controller_3640:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:voice_gateway_as5800:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:3660_router:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:7100_router:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:7200_router:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:7500_router:*:*:*:*:*:*:*:*
cpe:2.3:h:cisco:ubr7200:*:*:*:*:*:*:*:*