How severe is CVE-1999-0157?

CVE-1999-0157 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0157 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0157?

CVE-1999-0157 primarily affects Cisco Ios. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0157?

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

When was CVE-1999-0157 published?

CVE-1999-0157 was published on 1998-08-18 and last updated on 2026-06-16.

CVE-1999-0157

CVE-1999-0157 is a medium-severity vulnerability in Cisco Ios 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: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Cisco Ios
Published: 1998-08-18
Last modified: 2026-06-16

Description

Cisco PIX firewall and CBAC IP fragmentation attack results in a denial of service.

Frequently asked questions

What is CVE-1999-0157?: Cisco PIX firewall and CBAC IP fragmentation attack results in a denial of service.
How severe is CVE-1999-0157?: CVE-1999-0157 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0157 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0157?: CVE-1999-0157 primarily affects Cisco Ios. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0157?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0157 published?: CVE-1999-0157 was published on 1998-08-18 and last updated on 2026-06-16.

References

http://www.osvdb.org/1097

Affected products (5)

cpe:2.3:o:cisco:ios:11.2p:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:11.3t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:12.0t:*:*:*:*:*:*:*
cpe:2.3:o:cisco:pix_firewall_software:4.2\(1\):*:*:*:*:*:*:*

More vulnerabilities in Cisco Ios

CVE-2011-3271 — Critical (CVSS 10.0): Unspecified vulnerability in the Smart Install functionality in Cisco IOS 12.2 and 15.1 allows remote attackers to…
CVE-2011-0935 — Critical (CVSS 10.0): The PKI functionality in Cisco IOS 15.0 and 15.1 does not prevent permanent caching of certain public keys, which…
CVE-2010-1574 — Critical (CVSS 10.0): IOS 12.2(52)SE and 12.2(52)SE1 on Cisco Industrial Ethernet (IE) 3000 series switches has (1) a community name of…
CVE-2010-0581 — Critical (CVSS 10.0): Unspecified vulnerability in the SIP implementation in Cisco IOS 12.3 and 12.4 allows remote attackers to execute…
CVE-2010-0580 — Critical (CVSS 10.0): Unspecified vulnerability in the SIP implementation in Cisco IOS 12.3 and 12.4 allows remote attackers to execute…
CVE-2006-4950 — Critical (CVSS 10.0): Cisco IOS 12.2 through 12.4 before 20060920, as used by Cisco IAD2430, IAD2431, and IAD2432 Integrated Access Devices,…

All CVEs affecting Cisco Ios →