How severe is CVE-2007-5135?

CVE-2007-5135 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2007-5135 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5135?

CVE-2007-5135 primarily affects Openssl. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-5135?

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

When was CVE-2007-5135 published?

CVE-2007-5135 was published on 2007-09-27 and last updated on 2026-06-16.

CVE-2007-5135

CVE-2007-5135 is a medium-severity vulnerability in Openssl with a CVSS 2.0 base score of 6.8. Its EPSS exploit-prediction score of 16% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-189.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 16% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-189
Affected product: Openssl
Published: 2007-09-27
Last modified: 2026-06-16

Description

Off-by-one error in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 up to 0.9.7l, and 0.9.8 up to 0.9.8f, might allow remote attackers to execute arbitrary code via a crafted packet that triggers a one-byte buffer underflow. NOTE: this issue was introduced as a result of a fix for CVE-2006-3738. As of 20071012, it is unknown whether code execution is possible.

Frequently asked questions

What is CVE-2007-5135?: Off-by-one error in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 up to 0.9.7l, and 0.9.8 up to 0.9.8f, might allow remote attackers to execute arbitrary code via a crafted packet that triggers a one-byte buffer underflow. NOTE: this issue was introduced as a result of a fix for CVE-2006-3738. As of 20071012, it is unknown whether code execution is possible.
How severe is CVE-2007-5135?: CVE-2007-5135 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2007-5135 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5135?: CVE-2007-5135 primarily affects Openssl. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-5135?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-5135 published?: CVE-2007-5135 was published on 2007-09-27 and last updated on 2026-06-16.

References

Affected products (26)

cpe:2.3:a:openssl:openssl:0.9.7:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta1:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta2:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta3:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta4:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta5:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7:beta6:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7b:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7c:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7d:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7e:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7f:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7g:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7h:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7i:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7j:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7k:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.7l:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8a:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8b:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8c:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8d:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8e:*:*:*:*:*:*:*
cpe:2.3:a:openssl:openssl:0.9.8f:*:*:*:*:*:*:*

More vulnerabilities in Openssl

CVE-2009-3245 — Critical (CVSS 10.0): OpenSSL before 0.9.8m does not check for a NULL return value from bn_wexpand function calls in (1) crypto/bn/bn_div.c,…
CVE-2006-3738 — Critical (CVSS 10.0): Buffer overflow in the SSL_get_shared_ciphers function in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier…
CVE-2026-31789 — Critical (CVSS 9.8): Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer…
CVE-2022-2274 — Critical (CVSS 9.8): The OpenSSL 3.0.4 release introduced a serious bug in the RSA implementation for X86_64 CPUs supporting the AVX512IFMA…
CVE-2021-3711 — Critical (CVSS 9.8): In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt().…
CVE-2016-6309 — Critical (CVSS 9.8): statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote…

All CVEs affecting Openssl →

Other CWE-189 (Numeric Errors) vulnerabilities

CVE-2015-8396 — Critical (CVSS 10.0): Integer overflow in the ImageRegionReader::ReadIntoBuffer function in…
CVE-2015-7205 — Critical (CVSS 10.0): Integer underflow in the RTPReceiverVideo::ParseRtpPacket function in Mozilla Firefox before 43.0 and Firefox ESR 38.x…
CVE-2015-6575 — Critical (CVSS 10.0): SampleTable.cpp in libstagefright in Android before 5.1.1 LMY48I does not properly consider integer promotion, which…
CVE-2015-3864 — Critical (CVSS 10.0): Integer underflow in the MPEG4Extractor::parseChunk function in MPEG4Extractor.cpp in libstagefright in mediaserver in…
CVE-2015-3836 — Critical (CVSS 10.0): The Parse_wave function in arm-wt-22k/lib_src/eas_mdls.c in the Sonivox DLS-to-EAS converter in Android before 5.1.1…
CVE-2015-3834 — Critical (CVSS 10.0): Multiple integer overflows in the BnHDCP::onTransact function in media/libmedia/IHDCP.cpp in libstagefright in Android…

Browse all CWE-189 (Numeric Errors) vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

222.99.52.202 (ipv4-addr)
90.160.135.217 (ipv4-addr)
62.36.19.42 (ipv4-addr)
62.36.19.41 (ipv4-addr)
171.100.156.38 (ipv4-addr)