How severe is CVE-2021-33635?

CVE-2021-33635 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33635?

CVE-2021-33635 primarily affects Openeuler Isula. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33635?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-33635 published?

CVE-2021-33635 was published on 2023-10-29 and last updated on 2026-06-17.

CVE-2021-33635

CVE-2021-33635 is a critical-severity vulnerability in Openeuler Isula with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-665.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-665
Affected product: Openeuler Isula
Published: 2023-10-29
Last modified: 2026-06-17

Description

When malicious images are pulled by isula pull, attackers can execute arbitrary code.

Frequently asked questions

What is CVE-2021-33635?: When malicious images are pulled by isula pull, attackers can execute arbitrary code.
How severe is CVE-2021-33635?: CVE-2021-33635 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33635?: CVE-2021-33635 primarily affects Openeuler Isula. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-33635 published?: CVE-2021-33635 was published on 2023-10-29 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:openeuler:isula:2.0.8-20210518.144540:*:*:*:*:*:*:*
cpe:2.3:a:openeuler:isula:2.0.18-10:*:*:*:*:*:*:*
cpe:2.3:a:openeuler:isula:2.1.2:*:*:*:*:*:*:*

More vulnerabilities in Openeuler Isula

CVE-2021-33638 — High (CVSS 8.4): When the isula cp command is used to copy files from a container to a host machine and the container is controlled by…
CVE-2021-33637 — High (CVSS 8.4): When the isula export command is used to export a container to an image and the container is controlled by an attacker,…
CVE-2021-33636 — High (CVSS 8.4): When the isula load command is used to load malicious images, attackers can execute arbitrary code.

All CVEs affecting Openeuler Isula →

Other CWE-665 (Improper Initialization) vulnerabilities

CVE-2022-37128 — Critical (CVSS 9.8): In D-Link DIR-816 A2_v1.10CNB04.img the network can be initialized without authentication via /goform/wizard_end.
CVE-2021-41264 — Critical (CVSS 9.8): OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using…
CVE-2019-10196 — Critical (CVSS 9.8): A flaw was found in http-proxy-agent, prior to version 2.1.0. It was discovered http-proxy-agent passes an auth option…
CVE-2015-8367 — Critical (CVSS 9.8): The phase_one_correct function in Libraw before 0.17.1 allows attackers to cause memory errors and possibly execute…
CVE-2019-14271 — Critical (CVSS 9.8): In Docker 19.03.x before 19.03.1 linked against the GNU C Library (aka glibc), code injection can occur when the…
CVE-2018-11949 — Critical (CVSS 9.8): Failure to initialize the extra buffer can lead to an out of buffer access in WLAN function in Snapdragon Auto,…

Browse all CWE-665 (Improper Initialization) vulnerabilities →